def make_png(self, tex, fontsize, dpi, force=0):
if debug: force = True
basefile = self.get_basefile(tex, fontsize, dpi)
pngfile = '%s.png'% basefile
# see get_rgba for a discussion of the background
if force or not os.path.exists(pngfile):
dvifile = self.make_dvi(tex, fontsize)
outfile = basefile+'.output'
command = self.get_shell_cmd('cd "%s"' % self.texcache,
'dvipng -bg Transparent -D %s -T tight -o \
"%s" "%s" > "%s"'%(dpi, os.path.split(pngfile)[-1],
os.path.split(dvifile)[-1], outfile))
verbose.report(command, 'debug')
exit_status = os.system(command)
fh = file(outfile)
if exit_status:
raise RuntimeError('dvipng was not able to \
process the flowing file:\n%s\nHere is the full report generated by dvipng: \
\n\n'% dvifile + fh.read())
else: verbose.report(fh.read(), 'debug')
fh.close()
os.remove(outfile)
return pngfile
def make_dvi(self, tex, fontsize, force=0):
if debug: force = True
basefile = self.get_basefile(tex, fontsize)
dvifile = '%s.dvi'% basefile
if force or not os.path.exists(dvifile):
texfile = self.make_tex(tex, fontsize)
outfile = basefile+'.output'
command = self.get_shell_cmd('cd "%s"'% self.texcache,
'latex -interaction=nonstopmode %s > "%s"'\
%(os.path.split(texfile)[-1], outfile))
verbose.report(command, 'debug')
exit_status = os.system(command)
fh = file(outfile)
if exit_status:
raise RuntimeError('LaTeX was not able to process the flowing \
string:\n%s\nHere is the full report generated by LaTeX: \n\n'% tex + fh.read())
else: verbose.report(fh.read(), 'debug')
fh.close()
for fname in glob.glob(basefile+'*'):
if fname.endswith('dvi'): pass
elif fname.endswith('tex'): pass
else: os.remove(fname)
return dvifile
def make_ps(self, tex, fontsize, force=0):
if debug: force = True
basefile = self.get_basefile(tex, fontsize)
psfile = '%s.epsf'% basefile
if force or not os.path.exists(psfile):
dvifile = self.make_dvi(tex, fontsize)
outfile = basefile+'.output'
command = self.get_shell_cmd('cd "%s"'% self.texcache,
'dvips -q -E -o "%s" "%s" > "%s"'\
%(os.path.split(psfile)[-1],
os.path.split(dvifile)[-1], outfile))
verbose.report(command, 'debug')
exit_status = os.system(command)
fh = file(outfile)
if exit_status:
raise RuntimeError('dvipng was not able to \
process the flowing file:\n%s\nHere is the full report generated by dvipng: \
\n\n'% dvifile + fh.read())
else: verbose.report(fh.read(), 'debug')
fh.close()
os.remove(outfile)
return psfile
def __init__(self, width, height, dpi):
if __debug__: verbose.report('RendererAgg.__init__', 'debug-annoying')
self.dpi = dpi
self.width = width
self.height = height
self._renderer = _RendererAgg(int(width), int(height), dpi.get(),
debug=False)
self.draw_polygon = self._renderer.draw_polygon
self.draw_rectangle = self._renderer.draw_rectangle
self.draw_path = self._renderer.draw_path
self.draw_lines = self._renderer.draw_lines
self.draw_markers = self._renderer.draw_markers
self.draw_image = self._renderer.draw_image
self.draw_line_collection = self._renderer.draw_line_collection
self.draw_quad_mesh = self._renderer.draw_quad_mesh
self.draw_poly_collection = self._renderer.draw_poly_collection
self.draw_regpoly_collection = self._renderer.draw_regpoly_collection
self.copy_from_bbox = self._renderer.copy_from_bbox
self.restore_region = self._renderer.restore_region
self.texmanager = TexManager()
self.bbox = lbwh_to_bbox(0,0, self.width, self.height)
def fetch_historical_yahoo(ticker, date1, date2, cachename=None):
"""
Fetch historical data for ticker between date1 and date2. date1 and
date2 are datetime instances
Ex:
fh = fetch_historical_yahoo('^GSPC', d1, d2)
cachename is the name of the local file cache. If None, will
default to the md5 hash or the url (which incorporates the ticker
and date range)
a file handle is returned
"""
ticker = ticker.upper()
d1 = (date1.month-1, date1.day, date1.year)
d2 = (date2.month-1, date2.day, date2.year)
urlFmt = 'http://table.finance.yahoo.com/table.csv?a=%d&b=%d&c=%d&d=%d&e=%d&f=%d&s=%s&y=0&g=d&ignore=.csv'
url = urlFmt % (d1[0], d1[1], d1[2],
d2[0], d2[1], d2[2], ticker)
if cachename is None:
cachename = os.path.join(cachedir, md5(url).hexdigest())
if os.path.exists(cachename):
fh = file(cachename)
verbose.report('Using cachefile %s for %s'%(cachename, ticker))
else:
if not os.path.isdir(cachedir): os.mkdir(cachedir)
urlfh = urlopen(url)
fh = file(cachename, 'w')
fh.write(urlfh.read())
fh.close()
verbose.report('Saved %s data to cache file %s'%(ticker, cachename))
fh = file(cachename, 'r')
return fh
def _get_agg_font(self, prop):
"""
Get the font for text instance t, cacheing for efficiency
"""
if __debug__: verbose.report('RendererAgg._get_agg_font',
'debug-annoying')
key = hash(prop)
font = RendererAgg._fontd.get(key)
if font is None:
fname = findfont(prop)
font = RendererAgg._fontd.get(fname)
if font is None:
font = FT2Font(
fname,
hinting_factor=rcParams['text.hinting_factor'])
RendererAgg._fontd[fname] = font
RendererAgg._fontd[key] = font
font.clear()
size = prop.get_size_in_points()
font.set_size(size, self.dpi)
return font
def draw(self):
"""
Draw the figure using the renderer
"""
if __debug__: verbose.report('FigureCanvasAgg.draw', 'debug-annoying')
self.renderer = self.get_renderer()
self.figure.draw(self.renderer)
def quotes_historical_yahoo(ticker, date1, date2, asobject=False, adjusted=True):
"""
Get historical data for ticker between date1 and date2. date1 and
date2 are datetime instances
results are a list of tuples
(d, open, close, high, low, volume)
where d is a floating poing representation of date, as returned by date2num
if asobject is True, the return val is an object with attrs date,
open, close, high, low, volume, which are equal length arrays
if adjust=True, use adjusted prices
Ex:
sp = f.quotes_historical_yahoo('^GSPC', d1, d2, asobject=True, adjusted=True)
returns = (sp.open[1:] - sp.open[:-1])/sp.open[1:]
[n,bins,patches] = hist(returns, 100)
mu = mean(returns)
sigma = std(returns)
x = normpdf(bins, mu, sigma)
plot(bins, x, color='red', lw=2)
"""
d1 = (date1.month-1, date1.day, date1.year)
d2 = (date2.month-1, date2.day, date2.year)
urlFmt = 'http://table.finance.yahoo.com/table.csv?a=%d&b=%d&c=%d&d=%d&e=%d&f=%d&s=%s&y=0&g=d&ignore=.csv'
url = urlFmt % (d1[0], d1[1], d1[2],
d2[0], d2[1], d2[2], ticker)
cachename = os.path.join(cachedir, md5.md5(url).hexdigest())
if os.path.exists(cachename):
fh = file(cachename)
verbose.report('Using cachefile %s for %s'%(cachename, ticker))
else:
if not os.path.isdir(cachedir): os.mkdir(cachedir)
fh = file(cachename, 'w')
fh.write(urlopen(url).read())
fh.close()
verbose.report('Saved %s data to cache file %s'%(ticker, cachename))
fh = file(cachename, 'r')
ticker = ticker.upper()
try: ret = parse_yahoo_historical(fh, asobject, adjusted)
except IOError, exc:
warnings.warn('urlopen() failure\n' + url + '\n' + exc.strerror[1])
return None
def draw_text(self, gc, x, y, s, prop, angle, ismath):
"""
Render the text
"""
if __debug__:
verbose.report("RendererAgg.draw_text", "debug-annoying")
if ismath:
return self.draw_mathtext(gc, x, y, s, prop, angle)
flags = self._get_hinting_flag()
font = self._get_agg_font(prop)
if font is None:
return None
if len(s) == 1 and ord(s) > 127:
font.load_char(ord(s), flags=flags)
else:
# We pass '0' for angle here, since it will be rotated (in raster
# space) in the following call to draw_text_image).
font.set_text(s, 0, flags=flags)
font.draw_glyphs_to_bitmap()
# print x, y, int(x), int(y), s
self._renderer.draw_text_image(font.get_image(), int(x), int(y) + 1, angle, gc)
def cleanup(self):
'Clean-up and collect the process used to write the movie file.'
out, err = self._proc.communicate()
verbose.report('MovieWriter -- Command stdout:\n%s' % out,
level='debug')
verbose.report('MovieWriter -- Command stderr:\n%s' % err,
level='debug')
def points_to_pixels(self, points):
"""
convert point measures to pixes using dpi and the pixels per
inch of the display
"""
if __debug__: verbose.report('RendererAgg.points_to_pixels', 'debug-annoying')
return points*self.dpi.get()/72.0
def draw_image(self, x, y, im, bbox):
filename = os.path.join (tempfile.gettempdir(),
tempfile.gettempprefix() + '.png'
)
verbose.report ('Writing image file for include: %s' % filename)
# im.write_png() accepts a filename, not file object, would be
# good to avoid using files and write to mem with StringIO
# JDH: it *would* be good, but I don't know how to do this
# since libpng seems to want a FILE* and StringIO doesn't seem
# to provide one. I suspect there is a way, but I don't know
# it
im.flipud_out()
h,w = im.get_size_out()
y = self.height-y-h
im.write_png(filename)
imfile = file (filename, 'r')
image64 = base64.b64encode (imfile.read())
imfile.close()
os.remove(filename)
lines = [image64[i:i+76] for i in range(0, len(image64), 76)]
self._svgwriter.write (
'<image x="%f" y="%f" width="%f" height="%f" '
'xlink:href="data:image/png;base64,\n%s" />\n'
% (x, y, w+1, h+1, '\n'.join(lines))
)
# unflip
im.flipud_out()
def gs_distill(tmpfile, eps=False, ptype='letter', bbox=None):
"""
Use ghostscript's pswrite or epswrite device to distill a file.
This yields smaller files without illegal encapsulated postscript
operators. The output is low-level, converting text to outlines.
"""
paper = '-sPAPERSIZE=%s'% ptype
psfile = tmpfile + '.ps'
outfile = tmpfile + '.output'
dpi = rcParams['ps.distiller.res']
if sys.platform == 'win32': gs_exe = 'gswin32c'
else: gs_exe = 'gs'
command = '%s -dBATCH -dNOPAUSE -r%d -sDEVICE=pswrite %s -sOutputFile="%s" \
"%s" > "%s"'% (gs_exe, dpi, paper, psfile, tmpfile, outfile)
verbose.report(command, 'debug')
exit_status = os.system(command)
fh = file(outfile)
if exit_status: raise RuntimeError('ghostscript was not able to process \
your image.\nHere is the full report generated by ghostscript:\n\n' + fh.read())
else: verbose.report(fh.read(), 'debug')
fh.close()
os.remove(outfile)
os.remove(tmpfile)
shutil.move(psfile, tmpfile)
if eps:
pstoeps(tmpfile, bbox)
def draw_text(self, gc, x, y, s, prop, angle, ismath=False, mtext=None):
"""
Render the text
"""
if __debug__: verbose.report('RendererAgg.draw_text', 'debug-annoying')
if ismath:
return self.draw_mathtext(gc, x, y, s, prop, angle)
flags = get_hinting_flag()
font = self._get_agg_font(prop)
if font is None: return None
if len(s) == 1 and ord(s) > 127:
font.load_char(ord(s), flags=flags)
else:
# We pass '0' for angle here, since it will be rotated (in raster
# space) in the following call to draw_text_image).
font.set_text(s, 0, flags=flags)
font.draw_glyphs_to_bitmap(antialiased=rcParams['text.antialiased'])
d = font.get_descent() / 64.0
# The descent needs to be adjusted for the angle
xo, yo = font.get_bitmap_offset()
xo /= 64.0
yo /= 64.0
xd = -d * np.sin(np.deg2rad(angle))
yd = d * np.cos(np.deg2rad(angle))
#print x, y, int(x), int(y), s
self._renderer.draw_text_image(
font, np.round(x - xd + xo), np.round(y + yd + yo) + 1, angle, gc)
def set_linestyle(self, linestyle):
"""
Set the linestyle of the line
'steps' is equivalent to 'steps-pre' and is maintained for
backward-compatibility.
ACCEPTS: [ '-' | '--' | '-.' | ':' | 'None' | ' ' | '' ] and
any drawstyle in combination with a linestyle, e.g. 'steps--'.
"""
# handle long drawstyle names before short ones !
for ds in flatten([k.keys() for k in (self._drawStyles_l,
self._drawStyles_s)], is_string_like):
if linestyle.startswith(ds):
self.set_drawstyle(ds)
if len(linestyle) > len(ds):
linestyle = linestyle[len(ds):]
else:
linestyle = '-'
if linestyle not in self._lineStyles:
if linestyle in ls_mapper:
linestyle = ls_mapper[linestyle]
else:
verbose.report('Unrecognized line style %s, %s' %
(linestyle, type(linestyle)))
if linestyle in [' ','']:
linestyle = 'None'
self._linestyle = linestyle
def _fetch_historical_yahoo(self, ticker, date1, date2, freq=None, cachename=None):
"""matplotlib's implementation, modified to provide proxy support and frequency
Fetch historical data for ticker between date1 and date2. date1 and
date2 are date or datetime instances, or (year, month, day) sequences.
Ex:
fh = fetch_historical_yahoo('^GSPC', (2000, 1, 1), (2001, 12, 31))
cachename is the name of the local file cache. If None, will
default to the md5 hash or the url (which incorporates the ticker
and date range)
a file handle is returned
"""
if freq is None or type(freq) != str:
raise ValueError('Must enter a frequency as a string, m, w, or d')
proxy = self._proxy
ticker = ticker.upper()
configdir = get_configdir()
cachedir = os.path.join(configdir, 'finance.cache')
if iterable(date1):
d1 = (date1[1]-1, date1[2], date1[0])
else:
d1 = (date1.month-1, date1.day, date1.year)
if iterable(date2):
d2 = (date2[1]-1, date2[2], date2[0])
else:
d2 = (date2.month-1, date2.day, date2.year)
urlFmt = 'http://table.finance.yahoo.com/table.csv?a=%d&b=%d&c=%d&d=%d&e=%d&f=%d&s=%s&y=0&g=%s&ignore=.csv'
url = urlFmt % (d1[0], d1[1], d1[2],
d2[0], d2[1], d2[2], ticker, freq)
if proxy:
proxy_support = urllib2.ProxyHandler(proxy)
opener = urllib2.build_opener(proxy_support)
urllib2.install_opener(opener)
if cachename is None:
cachename = os.path.join(cachedir, md5(url).hexdigest())
if os.path.exists(cachename):
fh = file(cachename)
verbose.report('Using cachefile %s for %s'%(cachename, ticker))
else:
if not os.path.isdir(cachedir):
os.mkdir(cachedir)
urlfh = urllib2.urlopen(url)
fh = file(cachename, 'w')
fh.write(urlfh.read())
fh.close()
verbose.report('Saved %s data to cache file %s'%(ticker, cachename))
fh = file(cachename, 'r')
return fh
def cleanup(self):
MovieWriter.cleanup(self)
# Delete temporary files
if self.clear_temp:
verbose.report("MovieWriter: clearing temporary fnames=%s" % str(self._temp_names), level="debug")
for fname in self._temp_names:
os.remove(fname)
def _draw_image(self, x, y, im):
"""
Draw the Image instance into the current axes; x, y is the
upper left hand corner of the image
"""
if __debug__: verbose.report('RendererAgg.draw_image', 'debug-annoying')
#self._renderer.draw_image(int(x), int(self.height-y), im)
self._renderer.draw_image(int(x), int(y), im)
def draw_point(self, gc, x, y):
"""
Draw a single point at x,y
"""
if __debug__: verbose.report('RendererAgg.draw_point', 'debug-annoying')
rgbFace = gc.get_rgb()
self._renderer.draw_ellipse(
gc, rgbFace, x, y, 0.5, 0.5)
def __init__(self, canvas, num):
if _debug:
print("FigureManagerGTK.%s" % fn_name())
FigureManagerBase.__init__(self, canvas, num)
self.window = gtk.Window()
self.window.set_title("Figure %d" % num)
if window_icon:
try:
self.window.set_icon_from_file(window_icon)
except:
# some versions of gtk throw a glib.GError but not
# all, so I am not sure how to catch it. I am unhappy
# diong a blanket catch here, but an not sure what a
# better way is - JDH
verbose.report("Could not load matplotlib icon: %s" % sys.exc_info()[1])
self.vbox = gtk.VBox()
self.window.add(self.vbox)
self.vbox.show()
self.canvas.show()
# attach a show method to the figure for pylab ease of use
self.canvas.figure.show = lambda *args: self.window.show()
self.vbox.pack_start(self.canvas, True, True)
self.toolbar = self._get_toolbar(canvas)
# calculate size for window
w = int(self.canvas.figure.bbox.width)
h = int(self.canvas.figure.bbox.height)
if self.toolbar is not None:
self.toolbar.show()
self.vbox.pack_end(self.toolbar, False, False)
tb_w, tb_h = self.toolbar.size_request()
h += tb_h
self.window.set_default_size(w, h)
def destroy(*args):
Gcf.destroy(num)
self.window.connect("destroy", destroy)
self.window.connect("delete_event", destroy)
if matplotlib.is_interactive():
self.window.show()
def notify_axes_change(fig):
"this will be called whenever the current axes is changed"
if self.toolbar is not None:
self.toolbar.update()
self.canvas.figure.add_axobserver(notify_axes_change)
self.canvas.grab_focus()
def set_marker(self, marker):
"""
Set the line marker
========== ==========================
marker description
========== ==========================
'.' point
',' pixel
'o' circle
'v' triangle_down
'^' triangle_up
'<' triangle_left
'>' triangle_right
'1' tri_down
'2' tri_up
'3' tri_left
'4' tri_right
's' square
'p' pentagon
'*' star
'h' hexagon1
'H' hexagon2
'+' plus
'x' x
'D' diamond
'd' thin_diamond
'|' vline
'_' hline
TICKLEFT tickleft
TICKRIGHT tickright
TICKUP tickup
TICKDOWN tickdown
CARETLEFT caretleft
CARETRIGHT caretright
CARETUP caretup
CARETDOWN caretdown
'None' nothing
' ' nothing
'' nothing
========== ==========================
ACCEPTS: [ '+' | '*' | ',' | '.' | '1' | '2' | '3' | '4'
| '<' | '>' | 'D' | 'H' | '^' | '_' | 'd'
| 'h' | 'o' | 'p' | 's' | 'v' | 'x' | '|'
| TICKUP | TICKDOWN | TICKLEFT | TICKRIGHT
| 'None' | ' ' | '' ]
"""
if marker not in self._markers:
verbose.report('Unrecognized marker style %s, %s' %
(marker, type(marker)))
if marker in [' ','']:
marker = 'None'
self._marker = marker
self._markerFunc = self._markers[marker]
def convert_psfrags(tmpfile, psfrags, font_preamble, custom_preamble,
paperWidth, paperHeight, orientation):
"""
When we want to use the LaTeX backend with postscript, we write PSFrag tags
to a temporary postscript file, each one marking a position for LaTeX to
render some text. convert_psfrags generates a LaTeX document containing the
commands to convert those tags to text. LaTeX/dvips produces the postscript
file that includes the actual text.
"""
tmpdir = os.path.split(tmpfile)[0]
epsfile = tmpfile+'.eps'
shutil.move(tmpfile, epsfile)
latexfile = tmpfile+'.tex'
outfile = tmpfile+'.output'
latexh = file(latexfile, 'w')
dvifile = tmpfile+'.dvi'
psfile = tmpfile+'.ps'
if orientation=='landscape': angle = 90
else: angle = 0
if rcParams['text.latex.unicode']:
unicode_preamble = """\usepackage{ucs}
\usepackage[utf8x]{inputenc}"""
else:
unicode_preamble = ''
s = r"""\documentclass{article}
%s
%s
%s
\usepackage[dvips, papersize={%sin,%sin}, body={%sin,%sin}, margin={0in,0in}]{geometry}
\usepackage{psfrag}
\usepackage[dvips]{graphicx}
\usepackage{color}
\pagestyle{empty}
\begin{document}
\begin{figure}
\centering
\leavevmode
%s
\includegraphics*[angle=%s]{%s}
\end{figure}
\end{document}
"""% (font_preamble, unicode_preamble, custom_preamble, paperWidth, paperHeight,
paperWidth, paperHeight,
'\n'.join(psfrags), angle, os.path.split(epsfile)[-1])
if rcParams['text.latex.unicode']:
latexh.write(s.encode('utf8'))
else:
try:
latexh.write(s)
except UnicodeEncodeError, err:
verbose.report("You are using unicode and latex, but have "
"not enabled the matplotlib 'text.latex.unicode' "
"rcParam.", 'helpful')
raise
def get_dvipng_version():
stdin, stdout = os.popen4('dvipng --version')
for line in stdout:
if line.startswith('dvipng '):
version = line.split()[-1]
verbose.report('Found dvipng version %s'% version,
'helpful')
return version
raise RuntimeError('Could not obtain dvipng version')
def draw_line(self, gc, x1, y1, x2, y2):
"""
x and y are equal length arrays, draw lines connecting each
point in x, y
"""
if __debug__: verbose.report('RendererAgg.draw_line', 'debug-annoying')
x = array([x1,x2], typecode=Float)
y = array([y1,y2], typecode=Float)
self._renderer.draw_lines(gc, x, y)
def __init__(self, canvas, num):
if _debug: print 'FigureManagerGTK3.%s' % fn_name()
FigureManagerBase.__init__(self, canvas, num)
self.window = Gtk.Window()
self.set_window_title("Figure %d" % num)
try:
self.window.set_icon_from_file(window_icon)
except (SystemExit, KeyboardInterrupt):
# re-raise exit type Exceptions
raise
except:
# some versions of gtk throw a glib.GError but not
# all, so I am not sure how to catch it. I am unhappy
# doing a blanket catch here, but am not sure what a
# better way is - JDH
verbose.report('Could not load matplotlib icon: %s' % sys.exc_info()[1])
self.vbox = Gtk.Box()
self.vbox.set_property("orientation", Gtk.Orientation.VERTICAL)
self.window.add(self.vbox)
self.vbox.show()
self.canvas.show()
# attach a show method to the figure for pylab ease of use
self.canvas.figure.show = lambda *args: self.window.show()
self.vbox.pack_start(self.canvas, True, True, 0)
self.toolbar = self._get_toolbar(canvas)
# calculate size for window
w = int (self.canvas.figure.bbox.width)
h = int (self.canvas.figure.bbox.height)
if self.toolbar is not None:
self.toolbar.show()
self.vbox.pack_end(self.toolbar, False, False, 0)
size_request = self.toolbar.size_request()
h += size_request.height
self.window.set_default_size (w, h)
def destroy(*args):
Gcf.destroy(num)
self.window.connect("destroy", destroy)
self.window.connect("delete_event", destroy)
if matplotlib.is_interactive():
self.window.show()
def notify_axes_change(fig):
'this will be called whenever the current axes is changed'
if self.toolbar is not None: self.toolbar.update()
self.canvas.figure.add_axobserver(notify_axes_change)
self.canvas.grab_focus()
def draw_image(self, x, y, im, bbox, clippath=None, clippath_trans=None):
# MGDTODO: Support clippath here
trans = [1,0,0,1,0,0]
transstr = ''
if rcParams['svg.image_noscale']:
trans = list(im.get_matrix())
if im.get_interpolation() != 0:
trans[4] += trans[0]
trans[5] += trans[3]
trans[5] = -trans[5]
transstr = 'transform="matrix(%s %s %s %s %s %s)" '%tuple(trans)
assert trans[1] == 0
assert trans[2] == 0
numrows,numcols = im.get_size()
im.reset_matrix()
im.set_interpolation(0)
im.resize(numcols, numrows)
h,w = im.get_size_out()
self._svgwriter.write (
'<image x="%s" y="%s" width="%s" height="%s" '
'%s xlink:href="'%(x/trans[0], (self.height-y)/trans[3]-h, w, h, transstr)
)
if rcParams['svg.image_inline']:
class Base64Writer(object):
def __init__(self, write_method):
self._write_method = write_method
self._buffer = ''
def write(self, data):
self._buffer += data
while len(self._buffer) >= 64:
self._write_method(base64.encodestring(buffer[:64]))
self._write_method('\n')
self._buffer = self._buffer[64:]
def flush(self):
self._write_method(base64.encodestring(self._buffer))
self._write_method('\n')
self._svgwriter.write("data:image/png;base64,\n")
base64writer = Base64Writer(self._svgwriter.write)
im.flipud_out()
im.write_png(base64writer)
im.flipud_out()
base64writer.flush()
else:
self._imaged[self.basename] = self._imaged.get(self.basename,0) + 1
filename = '%s.image%d.png'%(self.basename, self._imaged[self.basename])
verbose.report( 'Writing image file for inclusion: %s' % filename)
im.flipud_out()
im.write_png(filename)
im.flipud_out()
self._svgwriter.write(filename)
self._svgwriter.write('"/>\n')
def _run(self):
# Uses subprocess to call the program for assembling frames into a
# movie file. *args* returns the sequence of command line arguments
# from a few configuration options.
command = self._args()
verbose.report('MovieWriter.run: running command: %s'%' '.join(command))
self._proc = subprocess.Popen(command, shell=False,
stdout=subprocess.PIPE, stderr=subprocess.PIPE,
stdin=subprocess.PIPE)
def draw_image(self, x, y, im, bbox):
trans = [1,0,0,1,0,0]
transstr = ''
if rcParams['svg.image_noscale']:
trans = list(im.get_matrix())
if im.get_interpolation() != 0:
trans[4] += trans[0]
trans[5] += trans[3]
trans[5] = -trans[5]
transstr = 'transform="matrix(%s %s %s %s %s %s)" '%tuple(trans)
assert trans[1] == 0
assert trans[2] == 0
numrows,numcols = im.get_size()
im.reset_matrix()
im.set_interpolation(0)
im.resize(numcols, numrows)
h,w = im.get_size_out()
if rcParams['svg.image_inline']:
filename = os.path.join (tempfile.gettempdir(),
tempfile.gettempprefix() + '.png'
)
verbose.report ('Writing temporary image file for inlining: %s' % filename)
# im.write_png() accepts a filename, not file object, would be
# good to avoid using files and write to mem with StringIO
# JDH: it *would* be good, but I don't know how to do this
# since libpng seems to want a FILE* and StringIO doesn't seem
# to provide one. I suspect there is a way, but I don't know
# it
im.flipud_out()
im.write_png(filename)
im.flipud_out()
imfile = file (filename, 'rb')
image64 = base64.encodestring (imfile.read())
imfile.close()
os.remove(filename)
hrefstr = 'data:image/png;base64,\n' + image64
else:
self._imaged[self.basename] = self._imaged.get(self.basename,0) + 1
filename = '%s.image%d.png'%(self.basename, self._imaged[self.basename])
verbose.report( 'Writing image file for inclusion: %s' % filename)
im.flipud_out()
im.write_png(filename)
im.flipud_out()
hrefstr = filename
self._svgwriter.write (
'<image x="%s" y="%s" width="%s" height="%s" '
'xlink:href="%s" %s/>\n'%(x/trans[0], (self.height-y)/trans[3]-h, w, h, hrefstr, transstr)
)
def new_figure_manager(num, *args, **kwargs):
"""
Create a new figure manager instance
"""
if __debug__: verbose.report('backend_agg.new_figure_manager', 'debug-annoying')
FigureClass = kwargs.pop('FigureClass', Figure)
thisFig = FigureClass(*args, **kwargs)
canvas = FigureCanvasAgg(thisFig)
manager = FigureManagerBase(canvas, num)
return manager
def on_event(self, event):
"""
Event handler that will be passed to the current figure to
retrieve events.
"""
self.add_event(event)
verbose.report("Event %i" % len(self.events))
self.post_event()
if len(self.events) >= self.n and self.n > 0:
self.fig.canvas.stop_event_loop()
def draw_image(self, gc, x, y, im, dx=None, dy=None, transform=None):
attrib = {}
clipid = self._get_clip(gc)
if clipid is not None:
# Can't apply clip-path directly to the image because the
# image has a transformation, which would also be applied
# to the clip-path
self.writer.start('g', attrib={'clip-path': 'url(#%s)' % clipid})
trans = [1, 0, 0, 1, 0, 0]
if rcParams['svg.image_noscale']:
trans = list(im.get_matrix())
trans[5] = -trans[5]
attrib['transform'] = generate_transform([('matrix', tuple(trans))
])
assert trans[1] == 0
assert trans[2] == 0
numrows, numcols = im.get_size()
im.reset_matrix()
im.set_interpolation(0)
im.resize(numcols, numrows)
h, w = im.get_size_out()
url = getattr(im, '_url', None)
if url is not None:
self.writer.start('a', attrib={'xlink:href': url})
if rcParams['svg.image_inline']:
stringio = cStringIO.StringIO()
im.flipud_out()
rows, cols, buffer = im.as_rgba_str()
_png.write_png(buffer, cols, rows, stringio)
im.flipud_out()
attrib['xlink:href'] = ("data:image/png;base64,\n" +
base64.encodestring(stringio.getvalue()))
else:
self._imaged[self.basename] = self._imaged.get(self.basename,
0) + 1
filename = '%s.image%d.png' % (self.basename,
self._imaged[self.basename])
verbose.report('Writing image file for inclusion: %s' % filename)
im.flipud_out()
rows, cols, buffer = im.as_rgba_str()
_png.write_png(buffer, cols, rows, filename)
im.flipud_out()
attrib['xlink:href'] = filename
alpha = gc.get_alpha()
if alpha != 1.0:
attrib['opacity'] = str(alpha)
if transform is None:
self.writer.element('image',
x=str(x / trans[0]),
y=str((self.height - y) / trans[3] - h),
width=str(w),
height=str(h),
attrib=attrib)
else:
flipped = self._make_flip_transform(transform)
attrib['transform'] = generate_transform([('matrix',
flipped.to_values())])
self.writer.element('image',
x=str(x),
y=str(y + dy),
width=str(dx),
height=str(-dy),
attrib=attrib)
if url is not None:
self.writer.end('a')
if clipid is not None:
self.writer.end('g')
def save(self,
filename,
fps=5,
codec='mpeg4',
clear_temp=True,
frame_prefix='_tmp'):
'''
Saves a movie file by drawing every frame.
*filename* is the output filename, eg :file:`mymovie.mp4`
*fps* is the frames per second in the movie
*codec* is the codec to be used,if it is supported by the output method.
*clear_temp* specifies whether the temporary image files should be
deleted.
*frame_prefix* gives the prefix that should be used for individual
image files. This prefix will have a frame number (i.e. 0001) appended
when saving individual frames.
'''
# Need to disconnect the first draw callback, since we'll be doing
# draws. Otherwise, we'll end up starting the animation.
if self._first_draw_id is not None:
self._fig.canvas.mpl_disconnect(self._first_draw_id)
reconnect_first_draw = True
else:
reconnect_first_draw = False
fnames = []
# Create a new sequence of frames for saved data. This is different
# from new_frame_seq() to give the ability to save 'live' generated
# frame information to be saved later.
# TODO: Right now, after closing the figure, saving a movie won't
# work since GUI widgets are gone. Either need to remove extra code
# to allow for this non-existant use case or find a way to make it work.
for idx, data in enumerate(self.new_saved_frame_seq()):
#TODO: Need to see if turning off blit is really necessary
self._draw_next_frame(data, blit=False)
fname = '%s%04d.png' % (frame_prefix, idx)
fnames.append(fname)
verbose.report('Animation.save: saved frame %d to fname=%s' %
(idx, fname),
level='debug')
self._fig.savefig(fname)
self._make_movie(filename, fps, codec, frame_prefix)
#Delete temporary files
if clear_temp:
import os
verbose.report('Animation.save: clearing temporary fnames=%s' %
str(fnames),
level='debug')
for fname in fnames:
os.remove(fname)
# Reconnect signal for first draw if necessary
if reconnect_first_draw:
self._first_draw_id = self._fig.canvas.mpl_connect(
'draw_event', self._start)
def _print_figure_tex(self, outfile, format, dpi, facecolor, edgecolor,
orientation, isLandscape, papertype):
"""
If text.usetex is True in rc, a temporary pair of tex/eps files
are created to allow tex to manage the text layout via the PSFrags
package. These files are processed to yield the final ps or eps file.
"""
isEPSF = format == 'eps'
title = outfile
# write to a temp file, we'll move it to outfile when done
fd, tmpfile = mkstemp()
os.close(fd)
fh = file(tmpfile, 'w')
self.figure.dpi = 72 # ignore the dpi kwarg
width, height = self.figure.get_size_inches()
xo = 0
yo = 0
l, b, w, h = self.figure.bbox.bounds
llx = xo
lly = yo
urx = llx + w
ury = lly + h
bbox = (llx, lly, urx, ury)
# generate PostScript code for the figure and store it in a string
origfacecolor = self.figure.get_facecolor()
origedgecolor = self.figure.get_edgecolor()
self.figure.set_facecolor(facecolor)
self.figure.set_edgecolor(edgecolor)
self._pswriter = StringIO()
renderer = RendererPS(width, height, self._pswriter, imagedpi=dpi)
self.figure.draw(renderer)
self.figure.set_facecolor(origfacecolor)
self.figure.set_edgecolor(origedgecolor)
# write the Encapsulated PostScript headers
print >>fh, "%!PS-Adobe-3.0 EPSF-3.0"
if title: print >>fh, "%%Title: "+title
print >>fh, ("%%Creator: matplotlib version "
+__version__+", http://matplotlib.sourceforge.net/")
print >>fh, "%%CreationDate: "+time.ctime(time.time())
print >>fh, "%%%%BoundingBox: %d %d %d %d" % bbox
print >>fh, "%%EndComments"
Ndict = len(psDefs)
print >>fh, "%%BeginProlog"
print >>fh, "/mpldict %d dict def"%Ndict
print >>fh, "mpldict begin"
for d in psDefs:
d=d.strip()
for l in d.split('\n'):
print >>fh, l.strip()
print >>fh, "end"
print >>fh, "%%EndProlog"
print >>fh, "mpldict begin"
#print >>fh, "gsave"
print >>fh, "%s translate"%_nums_to_str(xo, yo)
print >>fh, "%s clipbox"%_nums_to_str(width*72, height*72, 0, 0)
# write the figure
print >>fh, self._pswriter.getvalue()
# write the trailer
#print >>fh, "grestore"
print >>fh, "end"
print >>fh, "showpage"
fh.close()
if isLandscape: # now we are ready to rotate
isLandscape = True
width, height = height, width
bbox = (lly, llx, ury, urx)
temp_papertype = _get_papertype(width, height)
if papertype=='auto':
papertype = temp_papertype
paperWidth, paperHeight = papersize[temp_papertype]
else:
paperWidth, paperHeight = papersize[papertype]
if (width>paperWidth or height>paperHeight) and isEPSF:
paperWidth, paperHeight = papersize[temp_papertype]
verbose.report('Your figure is too big to fit on %s paper. %s \
paper will be used to prevent clipping.'%(papertype, temp_papertype), 'helpful')
texmanager = renderer.get_texmanager()
font_preamble = texmanager.get_font_preamble()
custom_preamble = texmanager.get_custom_preamble()
convert_psfrags(tmpfile, renderer.psfrag, font_preamble,
custom_preamble, paperWidth, paperHeight,
orientation)
if rcParams['ps.usedistiller'] == 'ghostscript':
gs_distill(tmpfile, isEPSF, ptype=papertype, bbox=bbox)
elif rcParams['ps.usedistiller'] == 'xpdf':
xpdf_distill(tmpfile, isEPSF, ptype=papertype, bbox=bbox)
elif rcParams['text.usetex']:
if False: pass # for debugging
else: gs_distill(tmpfile, isEPSF, ptype=papertype, bbox=bbox)
if isinstance(outfile, file):
fh = file(tmpfile)
print >>outfile, fh.read()
else: shutil.move(tmpfile, outfile)
def print_figure(self,
outfile,
dpi=72,
facecolor='w',
edgecolor='w',
orientation='portrait'):
"""
Render the figure to hardcopy. Set the figure patch face and
edge colors. This is useful because some of the GUIs have a
gray figure face color background and you'll probably want to
override this on hardcopy
If outfile is a string, it is interpreted as a file name.
If the extension matches .ep* write encapsulated postscript,
otherwise write a stand-alone PostScript file.
If outfile is a file object, a stand-alone PostScript file is
written into this file object.
If text.usetex is True in rc, a temporary pair of tex/eps files
are created to allow tex to handle the text. The final output
is a simple ps or eps file.
"""
if isinstance(outfile, file):
# assume plain PostScript and write to fileobject
isEPSF = False
fh = outfile
needsClose = False
title = None
else:
basename, ext = os.path.splitext(outfile)
if not ext:
if rcParams['text.usetex']:
ext = '.eps'
outfile += ext
else:
ext = '.ps'
outfile += ext
if rcParams['text.usetex']:
# need to make some temporary files so latex can run without
# writing over something important.
m = md5.md5(outfile)
tmpname = m.hexdigest()
epsfile = tmpname + '.eps'
psfile = tmpname + '.ps'
texfile = tmpname + '.tex'
dvifile = tmpname + '.dvi'
latexh = file(texfile, 'w')
fh = file(epsfile, 'w')
else:
fh = file(outfile, 'w')
isEPSF = ext.lower().startswith('.ep') or rcParams['text.usetex']
needsClose = True
title = outfile
# center the figure on the paper
self.figure.dpi.set(72) # ignore the passsed dpi setting for PS
width, height = self.figure.get_size_inches()
if orientation == 'landscape':
isLandscape = True
paperHeight, paperWidth = defaultPaperSize
else:
isLandscape = False
paperWidth, paperHeight = defaultPaperSize
xo = 72 * 0.5 * (paperWidth - width)
yo = 72 * 0.5 * (paperHeight - height)
l, b, w, h = self.figure.bbox.get_bounds()
llx = xo
lly = yo
urx = llx + w
ury = lly + h
if isLandscape:
xo, yo = 72 * paperHeight - yo, xo
llx, lly, urx, ury = lly, llx, ury, urx
rotation = 90
else:
rotation = 0
# generate PostScript code for the figure and store it in a string
origfacecolor = self.figure.get_facecolor()
origedgecolor = self.figure.get_edgecolor()
self.figure.set_facecolor(facecolor)
self.figure.set_edgecolor(edgecolor)
self._pswriter = StringIO()
renderer = RendererPS(width, height, self._pswriter)
self.figure.draw(renderer)
self.figure.set_facecolor(origfacecolor)
self.figure.set_edgecolor(origedgecolor)
# write the PostScript headers
if isEPSF:
print >> fh, "%!PS-Adobe-3.0 EPSF-3.0"
else:
print >> fh, "%!PS-Adobe-3.0"
if title: print >> fh, "%%Title: " + title
print >> fh, ("%%Creator: matplotlib version " + __version__ +
", http://matplotlib.sourceforge.net/")
print >> fh, "%%CreationDate: " + time.ctime(time.time())
if not isEPSF:
if paperWidth > paperHeight:
ostr = "Landscape"
else:
ostr = "Portrait"
print >> fh, "%%Orientation: " + ostr
print >> fh, "%%DocumentPaperSizes: " + defaultPaperType
print >> fh, "%%%%BoundingBox: %d %d %d %d" % (llx, lly, urx, ury)
if not isEPSF: print >> fh, "%%Pages: 1"
print >> fh, "%%EndComments"
Ndict = len(psDefs)
print >> fh, "%%BeginProlog"
if not rcParams['text.usetex']:
type42 = _type42 + [os.path.join(self.basepath, name) + '.ttf' \
for name in bakoma_fonts]
if not rcParams['ps.useafm']:
Ndict += len(type42)
print >> fh, "/mpldict %d dict def" % Ndict
print >> fh, "mpldict begin"
for d in psDefs:
d = d.strip()
for l in d.split('\n'):
print >> fh, l.strip()
if not rcParams['text.usetex']:
if not rcParams['ps.useafm']:
for font in type42:
print >> fh, "%%BeginFont: " + FT2Font(
str(font)).postscript_name
print >> fh, encodeTTFasPS(font)
print >> fh, "%%EndFont"
print >> fh, "%%EndProlog"
if not isEPSF: print >> fh, "%%Page: 1 1"
print >> fh, "mpldict begin"
#print >>fh, "gsave"
print >> fh, "%s translate" % _nums_to_str(xo, yo)
if rotation:
print >> fh, "%d rotate" % rotation
print >> fh, "%s clipbox" % _nums_to_str(width * 72, height * 72, 0, 0)
# write the figure
print >> fh, self._pswriter.getvalue()
# write the trailer
#print >>fh, "grestore"
print >> fh, "end"
print >> fh, "showpage"
if not isEPSF: print >> fh, "%%EOF"
if needsClose: fh.close()
if rcParams['text.usetex']:
if rcParams['text.tex.engine'] == 'latex':
fontpackage = rcParams['font.latex.package']
else:
fontpackage = 'type1cm'
pw, ph = defaultPaperSize
if width > pw - 2 or height > ph - 2:
pw, ph = _get_papersize(width, height)
print >> latexh, r"""\documentclass{scrartcl}
\usepackage{%s}
\usepackage{psfrag}
\usepackage[dvips]{graphicx}
\usepackage{color}
\pagestyle{empty}
\setlength{\paperheight}{%fin}
\setlength{\paperwidth}{%fin}
\setlength{\textwidth}{%fin}
\setlength{\textheight}{%fin}
\special{papersize=%fin,%fin}
\begin{document}
\begin{figure}[th!]
\begin{center}
%s
\includegraphics{%s}
\end{center}
\end{figure}
\end{document}
""" % (fontpackage, pw, ph, pw - 2, ph - 2, pw, ph, '\n'.join(
renderer.psfrag), epsfile)
latexh.close()
command = 'latex -interaction=nonstopmode "%s"' % texfile
verbose.report(command, 'debug-annoying')
stdin, stdout, stderr = os.popen3(command)
verbose.report(stdout.read(), 'debug-annoying')
verbose.report(stderr.read(), 'helpful')
command = 'dvips -R -T %fin,%fin -o "%s" "%s"' % (pw, ph, psfile,
dvifile)
verbose.report(command, 'debug-annoying')
stdin, stdout, stderr = os.popen3(command)
verbose.report(stdout.read(), 'debug-annoying')
verbose.report(stderr.read(), 'helpful')
os.remove(epsfile)
if ext.startswith('.ep'):
dpi = rcParams['ps.distiller.res']
if sys.platform == 'win32':
command = 'gswin32c -dBATCH -dNOPAUSE -dSAFER -r%d \
-sDEVICE=epswrite -dLanguageLevel=2 -dEPSFitPage \
-sOutputFile="%s" "%s"' % (dpi, epsfile, psfile)
else:
command = 'gs -dBATCH -dNOPAUSE -dSAFER -r%d \
-sDEVICE=epswrite -dLanguageLevel=2 -dEPSFitPage \
-sOutputFile="%s" "%s"' % (dpi, epsfile, psfile)
verbose.report(command, 'debug-annoying')
stdin, stdout, stderr = os.popen3(command)
verbose.report(stdout.read(), 'debug-annoying')
verbose.report(stderr.read(), 'helpful')
shutil.move(epsfile, outfile)
else:
shutil.move(psfile, outfile)
for fname in glob.glob(tmpname + '.*'):
os.remove(fname)
if rcParams['ps.usedistiller']:
dpi = rcParams['ps.distiller.res']
m = md5.md5(outfile)
tmpfile = m.hexdigest()
if ext.startswith('ep'):
command = 'eps2eps -dSAFER -r%d "%s" "%s"' % (dpi, outfile,
tmpfile)
else:
command = 'ps2ps -dSAFER -r%d "%s" "%s"' % (dpi, outfile,
tmpfile)
verbose.report(command, 'debug-annoying')
stdin, stdout, stderr = os.popen3(command)
verbose.report(stdout.read(), 'debug-annoying')
verbose.report(stderr.read(), 'helpful')
shutil.move(tmpfile, outfile)
except ImportError:
# Try using PySide
QT_API = QT_API_PYSIDE
if _sip_imported:
if QT_API == QT_API_PYQTv2:
if QT_API_ENV == 'pyqt':
cond = ("Found 'QT_API=pyqt' environment variable. "
"Setting PyQt4 API accordingly.\n")
else:
cond = "PyQt API v2 specified."
try:
sip.setapi('QString', 2)
except:
res = 'QString API v2 specification failed. Defaulting to v1.'
verbose.report(cond + res, 'helpful')
# condition has now been reported, no need to repeat it:
cond = ""
try:
sip.setapi('QVariant', 2)
except:
res = 'QVariant API v2 specification failed. Defaulting to v1.'
verbose.report(cond + res, 'helpful')
if QT_API in [QT_API_PYQT, QT_API_PYQTv2]: # PyQt4 API
from PyQt4 import QtCore, QtGui
try:
if sip.getapi("QString") > 1:
# Use new getSaveFileNameAndFilter()
def draw_image(self, gc, x, y, im, transform=None):
h, w = im.shape[:2]
if w == 0 or h == 0:
return
attrib = {}
clipid = self._get_clip(gc)
if clipid is not None:
# Can't apply clip-path directly to the image because the
# image has a transformation, which would also be applied
# to the clip-path
self.writer.start('g', attrib={'clip-path': 'url(#%s)' % clipid})
oid = gc.get_gid()
url = gc.get_url()
if url is not None:
self.writer.start('a', attrib={'xlink:href': url})
if rcParams['svg.image_inline']:
bytesio = io.BytesIO()
_png.write_png(im, bytesio)
oid = oid or self._make_id('image', bytesio.getvalue())
attrib['xlink:href'] = (
"data:image/png;base64,\n" +
base64.b64encode(bytesio.getvalue()).decode('ascii'))
else:
self._imaged[self.basename] = self._imaged.get(self.basename,
0) + 1
filename = '%s.image%d.png' % (self.basename,
self._imaged[self.basename])
verbose.report('Writing image file for inclusion: %s' % filename)
_png.write_png(im, filename)
oid = oid or 'Im_' + self._make_id('image', filename)
attrib['xlink:href'] = filename
attrib['id'] = oid
if transform is None:
w = 72.0 * w / self.image_dpi
h = 72.0 * h / self.image_dpi
self.writer.element('image',
transform=generate_transform([
('scale', (1, -1)), ('translate', (0, -h))
]),
x=short_float_fmt(x),
y=short_float_fmt(-(self.height - y - h)),
width=short_float_fmt(w),
height=short_float_fmt(h),
attrib=attrib)
else:
alpha = gc.get_alpha()
if alpha != 1.0:
attrib['opacity'] = short_float_fmt(alpha)
flipped = (Affine2D().scale(1.0 / w, 1.0 / h) + transform +
Affine2D().translate(x, y).scale(1.0, -1.0).translate(
0.0, self.height))
attrib['transform'] = generate_transform([('matrix',
flipped.frozen())])
self.writer.element('image',
width=short_float_fmt(w),
height=short_float_fmt(h),
attrib=attrib)
if url is not None:
self.writer.end('a')
if clipid is not None:
self.writer.end('g')
def save(self,
filename,
writer=None,
fps=None,
dpi=None,
codec=None,
bitrate=None,
extra_args=None,
metadata=None,
extra_anim=None,
savefig_kwargs=None):
'''
Saves a movie file by drawing every frame.
*filename* is the output filename, e.g., :file:`mymovie.mp4`
*writer* is either an instance of :class:`MovieWriter` or a string
key that identifies a class to use, such as 'ffmpeg' or 'mencoder'.
If nothing is passed, the value of the rcparam `animation.writer` is
used.
*fps* is the frames per second in the movie. Defaults to None,
which will use the animation's specified interval to set the frames
per second.
*dpi* controls the dots per inch for the movie frames. This combined
with the figure's size in inches controls the size of the movie.
*codec* is the video codec to be used. Not all codecs are supported
by a given :class:`MovieWriter`. If none is given, this defaults to the
value specified by the rcparam `animation.codec`.
*bitrate* specifies the amount of bits used per second in the
compressed movie, in kilobits per second. A higher number means a
higher quality movie, but at the cost of increased file size. If no
value is given, this defaults to the value given by the rcparam
`animation.bitrate`.
*extra_args* is a list of extra string arguments to be passed to the
underlying movie utiltiy. The default is None, which passes the
additional argurments in the 'animation.extra_args' rcParam.
*metadata* is a dictionary of keys and values for metadata to include
in the output file. Some keys that may be of use include:
title, artist, genre, subject, copyright, srcform, comment.
*extra_anim* is a list of additional `Animation` objects that should
be included in the saved movie file. These need to be from the same
`matplotlib.Figure` instance. Also, animation frames will just be
simply combined, so there should be a 1:1 correspondence between
the frames from the different animations.
*savefig_kwargs* is a dictionary containing keyword arguments to be
passed on to the 'savefig' command which is called repeatedly to save
the individual frames. This can be used to set tight bounding boxes,
for example.
'''
if savefig_kwargs is None:
savefig_kwargs = {}
# FIXME: Using 'bbox_inches' doesn't currently work with
# writers that pipe the data to the command because this
# requires a fixed frame size (see Ryan May's reply in this
# thread: [1]). Thus we drop the 'bbox_inches' argument if it
# exists in savefig_kwargs.
#
# [1] (http://matplotlib.1069221.n5.nabble.com/
# Animation-class-let-save-accept-kwargs-which-
# are-passed-on-to-savefig-td39627.html)
#
if 'bbox_inches' in savefig_kwargs:
if not (writer in ['ffmpeg_file', 'mencoder_file']
or isinstance(writer,
(FFMpegFileWriter, MencoderFileWriter))):
print("Warning: discarding the 'bbox_inches' argument in "
"'savefig_kwargs' as it is only currently supported "
"with the writers 'ffmpeg_file' and 'mencoder_file' "
"(writer used: "
"'{}').".format(writer if isinstance(writer, str) else
writer.__class__.__name__))
savefig_kwargs.pop('bbox_inches')
# Need to disconnect the first draw callback, since we'll be doing
# draws. Otherwise, we'll end up starting the animation.
if self._first_draw_id is not None:
self._fig.canvas.mpl_disconnect(self._first_draw_id)
reconnect_first_draw = True
else:
reconnect_first_draw = False
if fps is None and hasattr(self, '_interval'):
# Convert interval in ms to frames per second
fps = 1000. / self._interval
# If the writer is None, use the rc param to find the name of the one
# to use
if writer is None:
writer = rcParams['animation.writer']
# Re-use the savefig DPI for ours if none is given
if dpi is None:
dpi = rcParams['savefig.dpi']
if codec is None:
codec = rcParams['animation.codec']
if bitrate is None:
bitrate = rcParams['animation.bitrate']
all_anim = [self]
if not extra_anim is None:
all_anim.extend(anim for anim in extra_anim
if anim._fig is self._fig)
# If we have the name of a writer, instantiate an instance of the
# registered class.
if is_string_like(writer):
if writer in writers.avail:
writer = writers[writer](fps,
codec,
bitrate,
extra_args=extra_args,
metadata=metadata)
else:
import warnings
warnings.warn("MovieWriter %s unavailable" % writer)
try:
writer = writers.list()[0]
except IndexError:
raise ValueError("Cannot save animation: no writers are "
"available. Please install mencoder or "
"ffmpeg to save animations.")
verbose.report('Animation.save using %s' % type(writer),
level='helpful')
# Create a new sequence of frames for saved data. This is different
# from new_frame_seq() to give the ability to save 'live' generated
# frame information to be saved later.
# TODO: Right now, after closing the figure, saving a movie won't work
# since GUI widgets are gone. Either need to remove extra code to
# allow for this non-existant use case or find a way to make it work.
with writer.saving(self._fig, filename, dpi):
for data in itertools.izip(
*[a.new_saved_frame_seq() for a in all_anim]):
for anim, d in zip(all_anim, data):
#TODO: Need to see if turning off blit is really necessary
anim._draw_next_frame(d, blit=False)
writer.grab_frame(**savefig_kwargs)
# Reconnect signal for first draw if necessary
if reconnect_first_draw:
self._first_draw_id = self._fig.canvas.mpl_connect(
'draw_event', self._start)
def fetch_historical_yahoo(ticker,
date1,
date2,
cachename=None,
dividends=False):
"""
Fetch historical data for ticker between date1 and date2. date1 and
date2 are date or datetime instances, or (year, month, day) sequences.
Parameters
----------
ticker : str
ticker
date1 : sequence of form (year, month, day), `datetime`, or `date`
start date
date2 : sequence of form (year, month, day), `datetime`, or `date`
end date
cachename : str
cachename is the name of the local file cache. If None, will
default to the md5 hash or the url (which incorporates the ticker
and date range)
dividends : bool
set dividends=True to return dividends instead of price data. With
this option set, parse functions will not work
Returns
-------
file_handle : file handle
a file handle is returned
Examples
--------
>>> fh = fetch_historical_yahoo('^GSPC', (2000, 1, 1), (2001, 12, 31))
"""
ticker = ticker.upper()
if iterable(date1):
d1 = (date1[1] - 1, date1[2], date1[0])
else:
d1 = (date1.month - 1, date1.day, date1.year)
if iterable(date2):
d2 = (date2[1] - 1, date2[2], date2[0])
else:
d2 = (date2.month - 1, date2.day, date2.year)
if dividends:
g = 'v'
verbose.report('Retrieving dividends instead of prices')
else:
g = 'd'
urlFmt = ('http://ichart.yahoo.com/table.csv?a=%d&b=%d&' +
'c=%d&d=%d&e=%d&f=%d&s=%s&y=0&g=%s&ignore=.csv')
url = urlFmt % (d1[0], d1[1], d1[2], d2[0], d2[1], d2[2], ticker, g)
# Cache the finance data if cachename is supplied, or there is a writable
# cache directory.
if cachename is None and cachedir is not None:
cachename = os.path.join(cachedir, md5(url).hexdigest())
if cachename is not None:
if os.path.exists(cachename):
fh = open(cachename)
verbose.report('Using cachefile %s for '
'%s' % (cachename, ticker))
else:
mkdirs(os.path.abspath(os.path.dirname(cachename)))
with contextlib.closing(urlopen(url)) as urlfh:
with open(cachename, 'wb') as fh:
fh.write(urlfh.read())
verbose.report('Saved %s data to cache file '
'%s' % (ticker, cachename))
fh = open(cachename, 'r')
return fh
else:
return urlopen(url)
def tostring_rgb(self):
if __debug__:
verbose.report('RendererAgg.tostring_rgb', 'debug-annoying')
return self._renderer.tostring_rgb()
def draw_image(self, gc, x, y, im, dx=None, dy=None, transform=None):
attrib = {}
clipid = self._get_clip(gc)
if clipid is not None:
# Can't apply clip-path directly to the image because the
# image as a transformation, which would also be applied
# to the clip-path
self.writer.start(u'g', attrib={u'clip-path': u'url(#%s)' % clipid})
trans = [1,0,0,1,0,0]
if rcParams['svg.image_noscale']:
trans = list(im.get_matrix())
trans[5] = -trans[5]
attrib[u'transform'] = generate_transform([(u'matrix', tuple(trans))])
assert trans[1] == 0
assert trans[2] == 0
numrows, numcols = im.get_size()
im.reset_matrix()
im.set_interpolation(0)
im.resize(numcols, numrows)
h,w = im.get_size_out()
url = getattr(im, '_url', None)
if url is not None:
self.writer.start(u'a', attrib={u'xlink:href': url})
if rcParams['svg.image_inline']:
bytesio = io.BytesIO()
im.flipud_out()
rows, cols, buffer = im.as_rgba_str()
_png.write_png(buffer, cols, rows, bytesio)
im.flipud_out()
attrib[u'xlink:href'] = (
u"data:image/png;base64,\n" +
base64.b64encode(bytesio.getvalue()).decode('ascii'))
else:
self._imaged[self.basename] = self._imaged.get(self.basename,0) + 1
filename = u'%s.image%d.png'%(self.basename, self._imaged[self.basename])
verbose.report( 'Writing image file for inclusion: %s' % filename)
im.flipud_out()
rows, cols, buffer = im.as_rgba_str()
_png.write_png(buffer, cols, rows, filename)
im.flipud_out()
attrib[u'xlink:href'] = filename
if transform is None:
self.writer.element(
u'image',
x=unicode(x/trans[0]), y=unicode((self.height-y)/trans[3]-h),
width=unicode(w), height=unicode(h),
attrib=attrib)
else:
attrib[u'transform'] = generate_transform(
[(u'matrix', transform.to_values())])
self.writer.element(
u'image',
x=unicode(x), y=unicode(y), width=unicode(dx), height=unicode(dy),
attrib=attrib)
if url is not None:
self.writer.end(u'a')
if clipid is not None:
self.writer.end(u'g')
def add(self, patchlabel='', flows=None, orientations=None, labels='',
trunklength=1.0, pathlengths=0.25, prior=None, connect=(0, 0),
rotation=0, **kwargs):
"""
Add a simple Sankey diagram with flows at the same hierarchical level.
Return value is the instance of :class:`Sankey`.
Optional keyword arguments:
=============== ===================================================
Keyword Description
=============== ===================================================
*patchlabel* label to be placed at the center of the diagram
Note: *label* (not *patchlabel*) will be passed to
the patch through ``**kwargs`` and can be used to
create an entry in the legend.
*flows* array of flow values
By convention, inputs are positive and outputs are
negative.
*orientations* list of orientations of the paths
Valid values are 1 (from/to the top), 0 (from/to
the left or right), or -1 (from/to the bottom). If
*orientations* == 0, inputs will break in from the
left and outputs will break away to the right.
*labels* list of specifications of the labels for the flows
Each value may be *None* (no labels), '' (just
label the quantities), or a labeling string. If a
single value is provided, it will be applied to all
flows. If an entry is a non-empty string, then the
quantity for the corresponding flow will be shown
below the string. However, if the *unit* of the
main diagram is None, then quantities are never
shown, regardless of the value of this argument.
*trunklength* length between the bases of the input and output
groups
*pathlengths* list of lengths of the arrows before break-in or
after break-away
If a single value is given, then it will be applied
to the first (inside) paths on the top and bottom,
and the length of all other arrows will be
justified accordingly. The *pathlengths* are not
applied to the horizontal inputs and outputs.
*prior* index of the prior diagram to which this diagram
should be connected
*connect* a (prior, this) tuple indexing the flow of the
prior diagram and the flow of this diagram which
should be connected
If this is the first diagram or *prior* is *None*,
*connect* will be ignored.
*rotation* angle of rotation of the diagram [deg]
*rotation* is ignored if this diagram is connected
to an existing one (using *prior* and *connect*).
The interpretation of the *orientations* argument
will be rotated accordingly (e.g., if *rotation*
== 90, an *orientations* entry of 1 means to/from
the left).
=============== ===================================================
Valid kwargs are :meth:`matplotlib.patches.PathPatch` arguments:
%(Patch)s
As examples, ``fill=False`` and ``label='A legend entry'``.
By default, ``facecolor='#bfd1d4'`` (light blue) and
``linewidth=0.5``.
The indexing parameters (*prior* and *connect*) are zero-based.
The flows are placed along the top of the diagram from the inside out
in order of their index within the *flows* list or array. They are
placed along the sides of the diagram from the top down and along the
bottom from the outside in.
If the sum of the inputs and outputs is nonzero, the discrepancy
will appear as a cubic Bezier curve along the top and bottom edges of
the trunk.
.. seealso::
:meth:`finish`
"""
# Check and preprocess the arguments.
if flows is None:
flows = np.array([1.0, -1.0])
else:
flows = np.array(flows)
n = flows.shape[0] # Number of flows
if rotation is None:
rotation = 0
else:
# In the code below, angles are expressed in deg/90.
rotation /= 90.0
if orientations is None:
orientations = [0, 0]
if len(orientations) != n:
raise ValueError(
"orientations and flows must have the same length.\n"
"orientations has length %d, but flows has length %d."
% (len(orientations), n))
if labels != '' and getattr(labels, '__iter__', False):
# iterable() isn't used because it would give True if labels is a
# string
if len(labels) != n:
raise ValueError(
"If labels is a list, then labels and flows must have the "
"same length.\nlabels has length %d, but flows has length %d."
% (len(labels), n))
else:
labels = [labels] * n
if trunklength < 0:
raise ValueError(
"trunklength is negative.\nThis isn't allowed, because it would "
"cause poor layout.")
if np.absolute(np.sum(flows)) > self.tolerance:
verbose.report(
"The sum of the flows is nonzero (%f).\nIs the "
"system not at steady state?" % np.sum(flows), 'helpful')
scaled_flows = self.scale * flows
gain = sum(max(flow, 0) for flow in scaled_flows)
loss = sum(min(flow, 0) for flow in scaled_flows)
if not (0.5 <= gain <= 2.0):
verbose.report(
"The scaled sum of the inputs is %f.\nThis may "
"cause poor layout.\nConsider changing the scale so"
" that the scaled sum is approximately 1.0." % gain, 'helpful')
if not (-2.0 <= loss <= -0.5):
verbose.report(
"The scaled sum of the outputs is %f.\nThis may "
"cause poor layout.\nConsider changing the scale so"
" that the scaled sum is approximately 1.0." % gain, 'helpful')
if prior is not None:
if prior < 0:
raise ValueError("The index of the prior diagram is negative.")
if min(connect) < 0:
raise ValueError(
"At least one of the connection indices is negative.")
if prior >= len(self.diagrams):
raise ValueError(
"The index of the prior diagram is %d, but there are "
"only %d other diagrams.\nThe index is zero-based."
% (prior, len(self.diagrams)))
if connect[0] >= len(self.diagrams[prior].flows):
raise ValueError(
"The connection index to the source diagram is %d, but "
"that diagram has only %d flows.\nThe index is zero-based."
% (connect[0], len(self.diagrams[prior].flows)))
if connect[1] >= n:
raise ValueError(
"The connection index to this diagram is %d, but this diagram"
"has only %d flows.\n The index is zero-based."
% (connect[1], n))
if self.diagrams[prior].angles[connect[0]] is None:
raise ValueError(
"The connection cannot be made. Check that the magnitude "
"of flow %d of diagram %d is greater than or equal to the "
"specified tolerance." % (connect[0], prior))
flow_error = (self.diagrams[prior].flows[connect[0]] +
flows[connect[1]])
if abs(flow_error) >= self.tolerance:
raise ValueError(
"The scaled sum of the connected flows is %f, which is not "
"within the tolerance (%f)." % (flow_error, self.tolerance))
# Determine if the flows are inputs.
are_inputs = [None] * n
for i, flow in enumerate(flows):
if flow >= self.tolerance:
are_inputs[i] = True
elif flow <= -self.tolerance:
are_inputs[i] = False
else:
verbose.report(
"The magnitude of flow %d (%f) is below the "
"tolerance (%f).\nIt will not be shown, and it "
"cannot be used in a connection."
% (i, flow, self.tolerance), 'helpful')
# Determine the angles of the arrows (before rotation).
angles = [None] * n
for i, (orient, is_input) in enumerate(zip(orientations, are_inputs)):
if orient == 1:
if is_input:
angles[i] = DOWN
elif not is_input:
# Be specific since is_input can be None.
angles[i] = UP
elif orient == 0:
if is_input is not None:
angles[i] = RIGHT
else:
if orient != -1:
raise ValueError(
"The value of orientations[%d] is %d, "
"but it must be [ -1 | 0 | 1 ]." % (i, orient))
if is_input:
angles[i] = UP
elif not is_input:
angles[i] = DOWN
# Justify the lengths of the paths.
if iterable(pathlengths):
if len(pathlengths) != n:
raise ValueError(
"If pathlengths is a list, then pathlengths and flows must "
"have the same length.\npathlengths has length %d, but flows "
"has length %d." % (len(pathlengths), n))
else: # Make pathlengths into a list.
urlength = pathlengths
ullength = pathlengths
lrlength = pathlengths
lllength = pathlengths
d = dict(RIGHT=pathlengths)
pathlengths = [d.get(angle, 0) for angle in angles]
# Determine the lengths of the top-side arrows
# from the middle outwards.
for i, (angle, is_input, flow) in enumerate(zip(angles, are_inputs,
scaled_flows)):
if angle == DOWN and is_input:
pathlengths[i] = ullength
ullength += flow
elif angle == UP and not is_input:
pathlengths[i] = urlength
urlength -= flow # Flow is negative for outputs.
# Determine the lengths of the bottom-side arrows
# from the middle outwards.
for i, (angle, is_input, flow) in enumerate(reversed(list(zip(
angles, are_inputs, scaled_flows)))):
if angle == UP and is_input:
pathlengths[n - i - 1] = lllength
lllength += flow
elif angle == DOWN and not is_input:
pathlengths[n - i - 1] = lrlength
lrlength -= flow
# Determine the lengths of the left-side arrows
# from the bottom upwards.
has_left_input = False
for i, (angle, is_input, spec) in enumerate(reversed(list(zip(
angles, are_inputs, zip(scaled_flows, pathlengths))))):
if angle == RIGHT:
if is_input:
if has_left_input:
pathlengths[n - i - 1] = 0
else:
has_left_input = True
# Determine the lengths of the right-side arrows
# from the top downwards.
has_right_output = False
for i, (angle, is_input, spec) in enumerate(zip(
angles, are_inputs, list(zip(scaled_flows, pathlengths)))):
if angle == RIGHT:
if not is_input:
if has_right_output:
pathlengths[i] = 0
else:
has_right_output = True
# Begin the subpaths, and smooth the transition if the sum of the flows
# is nonzero.
urpath = [(Path.MOVETO, [(self.gap - trunklength / 2.0), # Upper right
gain / 2.0]),
(Path.LINETO, [(self.gap - trunklength / 2.0) / 2.0,
gain / 2.0]),
(Path.CURVE4, [(self.gap - trunklength / 2.0) / 8.0,
gain / 2.0]),
(Path.CURVE4, [(trunklength / 2.0 - self.gap) / 8.0,
-loss / 2.0]),
(Path.LINETO, [(trunklength / 2.0 - self.gap) / 2.0,
-loss / 2.0]),
(Path.LINETO, [(trunklength / 2.0 - self.gap),
-loss / 2.0])]
llpath = [(Path.LINETO, [(trunklength / 2.0 - self.gap), # Lower left
loss / 2.0]),
(Path.LINETO, [(trunklength / 2.0 - self.gap) / 2.0,
loss / 2.0]),
(Path.CURVE4, [(trunklength / 2.0 - self.gap) / 8.0,
loss / 2.0]),
(Path.CURVE4, [(self.gap - trunklength / 2.0) / 8.0,
-gain / 2.0]),
(Path.LINETO, [(self.gap - trunklength / 2.0) / 2.0,
-gain / 2.0]),
(Path.LINETO, [(self.gap - trunklength / 2.0),
-gain / 2.0])]
lrpath = [(Path.LINETO, [(trunklength / 2.0 - self.gap), # Lower right
loss / 2.0])]
ulpath = [(Path.LINETO, [self.gap - trunklength / 2.0, # Upper left
gain / 2.0])]
# Add the subpaths and assign the locations of the tips and labels.
tips = np.zeros((n, 2))
label_locations = np.zeros((n, 2))
# Add the top-side inputs and outputs from the middle outwards.
for i, (angle, is_input, spec) in enumerate(zip(
angles, are_inputs, list(zip(scaled_flows, pathlengths)))):
if angle == DOWN and is_input:
tips[i, :], label_locations[i, :] = self._add_input(
ulpath, angle, *spec)
elif angle == UP and not is_input:
tips[i, :], label_locations[i, :] = self._add_output(
urpath, angle, *spec)
# Add the bottom-side inputs and outputs from the middle outwards.
for i, (angle, is_input, spec) in enumerate(reversed(list(zip(
angles, are_inputs, list(zip(scaled_flows, pathlengths)))))):
if angle == UP and is_input:
tip, label_location = self._add_input(llpath, angle, *spec)
tips[n - i - 1, :] = tip
label_locations[n - i - 1, :] = label_location
elif angle == DOWN and not is_input:
tip, label_location = self._add_output(lrpath, angle, *spec)
tips[n - i - 1, :] = tip
label_locations[n - i - 1, :] = label_location
# Add the left-side inputs from the bottom upwards.
has_left_input = False
for i, (angle, is_input, spec) in enumerate(reversed(list(zip(
angles, are_inputs, list(zip(scaled_flows, pathlengths)))))):
if angle == RIGHT and is_input:
if not has_left_input:
# Make sure the lower path extends
# at least as far as the upper one.
if llpath[-1][1][0] > ulpath[-1][1][0]:
llpath.append((Path.LINETO, [ulpath[-1][1][0],
llpath[-1][1][1]]))
has_left_input = True
tip, label_location = self._add_input(llpath, angle, *spec)
tips[n - i - 1, :] = tip
label_locations[n - i - 1, :] = label_location
# Add the right-side outputs from the top downwards.
has_right_output = False
for i, (angle, is_input, spec) in enumerate(zip(
angles, are_inputs, list(zip(scaled_flows, pathlengths)))):
if angle == RIGHT and not is_input:
if not has_right_output:
# Make sure the upper path extends
# at least as far as the lower one.
if urpath[-1][1][0] < lrpath[-1][1][0]:
urpath.append((Path.LINETO, [lrpath[-1][1][0],
urpath[-1][1][1]]))
has_right_output = True
tips[i, :], label_locations[i, :] = self._add_output(
urpath, angle, *spec)
# Trim any hanging vertices.
if not has_left_input:
ulpath.pop()
llpath.pop()
if not has_right_output:
lrpath.pop()
urpath.pop()
# Concatenate the subpaths in the correct order (clockwise from top).
path = (urpath + self._revert(lrpath) + llpath + self._revert(ulpath) +
[(Path.CLOSEPOLY, urpath[0][1])])
# Create a patch with the Sankey outline.
codes, vertices = list(zip(*path))
vertices = np.array(vertices)
def _get_angle(a, r):
if a is None:
return None
else:
return a + r
if prior is None:
if rotation != 0: # By default, none of this is needed.
angles = [_get_angle(angle, rotation) for angle in angles]
rotate = Affine2D().rotate_deg(rotation * 90).transform_affine
tips = rotate(tips)
label_locations = rotate(label_locations)
vertices = rotate(vertices)
text = self.ax.text(0, 0, s=patchlabel, ha='center', va='center')
else:
rotation = (self.diagrams[prior].angles[connect[0]] -
angles[connect[1]])
angles = [_get_angle(angle, rotation) for angle in angles]
rotate = Affine2D().rotate_deg(rotation * 90).transform_affine
tips = rotate(tips)
offset = self.diagrams[prior].tips[connect[0]] - tips[connect[1]]
translate = Affine2D().translate(*offset).transform_affine
tips = translate(tips)
label_locations = translate(rotate(label_locations))
vertices = translate(rotate(vertices))
kwds = dict(s=patchlabel, ha='center', va='center')
text = self.ax.text(*offset, **kwds)
if False: # Debug
print("llpath\n", llpath)
print("ulpath\n", self._revert(ulpath))
print("urpath\n", urpath)
print("lrpath\n", self._revert(lrpath))
xs, ys = list(zip(*vertices))
self.ax.plot(xs, ys, 'go-')
patch = PathPatch(Path(vertices, codes),
fc=kwargs.pop('fc', kwargs.pop('facecolor',
'#bfd1d4')), # Custom defaults
lw=kwargs.pop('lw', kwargs.pop('linewidth', 0.5)),
**kwargs)
self.ax.add_patch(patch)
# Add the path labels.
texts = []
for number, angle, label, location in zip(flows, angles, labels,
label_locations):
if label is None or angle is None:
label = ''
elif self.unit is not None:
quantity = self.format % abs(number) + self.unit
if label != '':
label += "\n"
label += quantity
texts.append(self.ax.text(x=location[0], y=location[1],
s=label,
ha='center', va='center'))
# Text objects are placed even they are empty (as long as the magnitude
# of the corresponding flow is larger than the tolerance) in case the
# user wants to provide labels later.
# Expand the size of the diagram if necessary.
self.extent = (min(np.min(vertices[:, 0]),
np.min(label_locations[:, 0]),
self.extent[0]),
max(np.max(vertices[:, 0]),
np.max(label_locations[:, 0]),
self.extent[1]),
min(np.min(vertices[:, 1]),
np.min(label_locations[:, 1]),
self.extent[2]),
max(np.max(vertices[:, 1]),
np.max(label_locations[:, 1]),
self.extent[3]))
# Include both vertices _and_ label locations in the extents; there are
# where either could determine the margins (e.g., arrow shoulders).
# Add this diagram as a subdiagram.
self.diagrams.append(Bunch(patch=patch, flows=flows, angles=angles,
tips=tips, text=text, texts=texts))
# Allow a daisy-chained call structure (see docstring for the class).
return self
def print_figure(self, filename, dpi=150,
facecolor='w', edgecolor='w',
orientation='portrait'):
"""
Render the figure to hardcopy. Set the figure patch face and
edge colors. This is useful because some of the GUIs have a
gray figure face color background and you'll probably want to
override this on hardcopy
If the extension matches PNG, write a PNG file
If the extension matches BMP or RAW, write an RGBA bitmap file
If filename is a fileobject, write png to file object (thus
you can, for example, write the png to stdout
"""
if __debug__: verbose.report('FigureCanvasAgg.print_figure', 'debug-annoying')
# store the orig figure dpi, color and size information so we
# can restore them later. For image creation alone, this is
# not important since after the print the figure is done. But
# backend_agg may be used as a renderer for a GUI figure, and
# restoring figure props will be important in that case.
# TODO: move most of this functionality into backend_bases
origDPI = self.figure.dpi.get()
origfacecolor = self.figure.get_facecolor()
origedgecolor = self.figure.get_edgecolor()
self.figure.dpi.set(dpi)
self.figure.set_facecolor(facecolor)
self.figure.set_edgecolor(edgecolor)
# render the printed figure
self.draw()
if isinstance(filename, file):
# assume png and write to fileobject
self.renderer._renderer.write_png(filename)
#pass
else:
# take a look at the extension and choose the print handler
basename, ext = os.path.splitext(filename)
if not len(ext):
ext = '.png'
filename += ext
ext = ext.lower()
if (ext.find('rgb')>=0 or
ext.find('raw')>=0 or
ext.find('bmp')>=0 ):
# agg doesn't handle unicode yet
self.renderer._renderer.write_rgba(str(filename))
elif ext.find('png')>=0:
# agg doesn't handle unicode yet
self.renderer._renderer.write_png(str(filename))
#pass
elif ext.find('svg')>=0:
from backend_svg import FigureCanvasSVG
svg = self.switch_backends(FigureCanvasSVG)
svg.print_figure(filename, dpi, facecolor, edgecolor, orientation)
elif ext.find('ps')>=0 or ext.find('ep')>=0:
from backend_ps import FigureCanvasPS # lazy import
ps = self.switch_backends(FigureCanvasPS)
ps.print_figure(filename, dpi, facecolor, edgecolor, orientation)
else:
error_msg('Do not know know to handle extension *%s' % ext)
# restore the original figure properties
self.figure.dpi.set(origDPI)
self.figure.set_facecolor(origfacecolor)
self.figure.set_edgecolor(origedgecolor)
h = abs(y1 - y0)
rect = [ int(val)for val in min(x0,x1), min(y0, y1), w, h ]
self.canvas.drawRectangle( rect )
def save_figure( self ):
fname = qt.QFileDialog.getSaveFileName()
if fname:
self.canvas.print_figure( fname.latin1() )
# set icon used when windows are minimized
try:
qt.window_set_default_icon_from_file (
os.path.join( matplotlib.rcParams['datapath'], 'matplotlib.svg' ) )
except:
verbose.report( 'Could not load matplotlib icon: %s' % sys.exc_info()[1] )
def error_msg_qt( msg, parent=None ):
if not is_string_like( msg ):
msg = ','.join( map( str,msg ) )
qt.QMessageBox.warning( None, "Matplotlib", msg, qt.QMessageBox.Ok )
def exception_handler( type, value, tb ):
"""Handle uncaught exceptions
It does not catch SystemExit
"""
msg = ''
# get the filename attribute if available (for IOError)
if hasattr(value, 'filename') and value.filename != None:
def draw_image(self, x, y, im, bbox, clippath=None, clippath_trans=None):
# MGDTODO: Support clippath here
trans = [1, 0, 0, 1, 0, 0]
transstr = ''
if rcParams['svg.image_noscale']:
trans = list(im.get_matrix())
if im.get_interpolation() != 0:
trans[4] += trans[0]
trans[5] += trans[3]
trans[5] = -trans[5]
transstr = 'transform="matrix(%s %s %s %s %s %s)" ' % tuple(trans)
assert trans[1] == 0
assert trans[2] == 0
numrows, numcols = im.get_size()
im.reset_matrix()
im.set_interpolation(0)
im.resize(numcols, numrows)
h, w = im.get_size_out()
self._svgwriter.write(
'<image x="%s" y="%s" width="%s" height="%s" '
'%s xlink:href="' %
(x / trans[0], (self.height - y) / trans[3] - h, w, h, transstr))
if rcParams['svg.image_inline']:
class Base64Writer(object):
def __init__(self, write_method):
self._write_method = write_method
self._buffer = ''
def write(self, data):
self._buffer += data
while len(self._buffer) >= 64:
self._write_method(base64.encodestring(buffer[:64]))
self._write_method('\n')
self._buffer = self._buffer[64:]
def flush(self):
self._write_method(base64.encodestring(self._buffer))
self._write_method('\n')
self._svgwriter.write("data:image/png;base64,\n")
base64writer = Base64Writer(self._svgwriter.write)
im.flipud_out()
im.write_png(base64writer)
im.flipud_out()
base64writer.flush()
else:
self._imaged[self.basename] = self._imaged.get(self.basename,
0) + 1
filename = '%s.image%d.png' % (self.basename,
self._imaged[self.basename])
verbose.report('Writing image file for inclusion: %s' % filename)
im.flipud_out()
im.write_png(filename)
im.flipud_out()
self._svgwriter.write(filename)
self._svgwriter.write('"/>\n')
def draw_image(self, gc, x, y, im, dx=None, dy=None, transform=None):
attrib = {}
clipid = self._get_clip(gc)
if clipid is not None:
# Can't apply clip-path directly to the image because the
# image has a transformation, which would also be applied
# to the clip-path
self.writer.start('g', attrib={'clip-path': 'url(#%s)' % clipid})
trans = [1, 0, 0, 1, 0, 0]
if rcParams['svg.image_noscale']:
trans = list(im.get_matrix())
trans[5] = -trans[5]
attrib['transform'] = generate_transform([('matrix', tuple(trans))
])
assert trans[1] == 0
assert trans[2] == 0
numrows, numcols = im.get_size()
im.reset_matrix()
im.set_interpolation(0)
im.resize(numcols, numrows)
h, w = im.get_size_out()
if dx is None:
w = 72.0 * w / self.image_dpi
else:
w = dx
if dy is None:
h = 72.0 * h / self.image_dpi
else:
h = dy
oid = getattr(im, '_gid', None)
url = getattr(im, '_url', None)
if url is not None:
self.writer.start('a', attrib={'xlink:href': url})
if rcParams['svg.image_inline']:
bytesio = io.BytesIO()
_png.write_png(np.array(im)[::-1], bytesio)
oid = oid or self._make_id('image', bytesio)
attrib['xlink:href'] = (
"data:image/png;base64,\n" +
base64.b64encode(bytesio.getvalue()).decode('ascii'))
else:
self._imaged[self.basename] = self._imaged.get(self.basename,
0) + 1
filename = '%s.image%d.png' % (self.basename,
self._imaged[self.basename])
verbose.report('Writing image file for inclusion: %s' % filename)
_png.write_png(np.array(im)[::-1], filename)
oid = oid or 'Im_' + self._make_id('image', filename)
attrib['xlink:href'] = filename
alpha = gc.get_alpha()
if alpha != 1.0:
attrib['opacity'] = str(alpha)
attrib['id'] = oid
if transform is None:
self.writer.element('image',
x=six.text_type(x / trans[0]),
y=six.text_type((self.height - y) / trans[3] -
h),
width=six.text_type(w),
height=six.text_type(h),
attrib=attrib)
else:
flipped = self._make_flip_transform(transform)
flipped = np.array(flipped.to_values())
y = y + dy
if dy > 0.0:
flipped[3] *= -1.0
y *= -1.0
attrib['transform'] = generate_transform([('matrix', flipped)])
self.writer.element('image',
x=six.text_type(x),
y=six.text_type(y),
width=six.text_type(dx),
height=six.text_type(abs(dy)),
attrib=attrib)
if url is not None:
self.writer.end('a')
if clipid is not None:
self.writer.end('g')
def convert_psfrags(tmpfile, psfrags, font_preamble, pw, ph):
"""
When we want to use the LaTeX backend with postscript, we write PSFrag tags
to a temporary postscript file, each one marking a position for LaTeX to
render some text. convert_psfrags generates a LaTeX document containing the
commands to convert those tags to text. LaTeX/dvips produces the postscript
file that includes the actual text.
"""
epsfile = tmpfile+'.eps'
shutil.move(tmpfile, epsfile)
latexfile = tmpfile+'.tex'
latexh = file(latexfile, 'w')
dvifile = tmpfile+'.dvi'
psfile = tmpfile+'.ps'
print >>latexh, r"""\documentclass{scrartcl}
%s
\usepackage{psfrag}
\usepackage[dvips]{graphicx}
\usepackage{color}
\pagestyle{empty}
\setlength{\oddsidemargin}{0in}
\setlength{\evensidemargin}{0in}
\setlength{\topmargin}{0in}
\setlength{\headheight}{0in}
\setlength{\headsep}{0in}
\setlength{\parindent}{0in}
\setlength{\paperwidth}{%fin}
\setlength{\paperheight}{%fin}
\setlength{\textwidth}{%fin}
\setlength{\textheight}{%fin}
\special{papersize=%fin,%fin}
\begin{document}
\begin{figure}
\centering
%s
\includegraphics{%s}
\end{figure}
\end{document}
"""% (font_preamble, pw, ph, pw-2, ph-2, pw, ph, '\n'.join(psfrags), os.path.split(epsfile)[-1])
latexh.close()
curdir = os.getcwd()
os.chdir(gettempdir())
command = 'latex -interaction=nonstopmode "%s"' % latexfile
verbose.report(command, 'debug-annoying')
stdin, stdout, stderr = os.popen3(command)
verbose.report(stdout.read(), 'debug-annoying')
verbose.report(stderr.read(), 'helpful')
command = 'dvips -R -T %fin,%fin -o "%s" "%s"' % \
(pw, ph, psfile, dvifile)
verbose.report(command, 'debug-annoying')
stdin, stdout, stderr = os.popen3(command)
verbose.report(stdout.read(), 'debug-annoying')
verbose.report(stderr.read(), 'helpful')
shutil.move(psfile, tmpfile)
for fname in glob.glob(tmpfile+'.*'):
os.remove(fname)
os.chdir(curdir)
def __init__(self, canvas, num):
if _debug: print('FigureManagerGTK3.%s' % fn_name())
FigureManagerBase.__init__(self, canvas, num)
self.window = Gtk.Window()
self.window.set_wmclass("matplotlib", "Matplotlib")
self.set_window_title("Figure %d" % num)
try:
self.window.set_icon_from_file(window_icon)
except (SystemExit, KeyboardInterrupt):
# re-raise exit type Exceptions
raise
except:
# some versions of gtk throw a glib.GError but not
# all, so I am not sure how to catch it. I am unhappy
# doing a blanket catch here, but am not sure what a
# better way is - JDH
verbose.report('Could not load matplotlib icon: %s' %
sys.exc_info()[1])
self.vbox = Gtk.Box()
self.vbox.set_property("orientation", Gtk.Orientation.VERTICAL)
self.window.add(self.vbox)
self.vbox.show()
self.canvas.show()
self.vbox.pack_start(self.canvas, True, True, 0)
# calculate size for window
w = int(self.canvas.figure.bbox.width)
h = int(self.canvas.figure.bbox.height)
self.toolmanager = self._get_toolmanager()
self.toolbar = self._get_toolbar()
self.statusbar = None
def add_widget(child, expand, fill, padding):
child.show()
self.vbox.pack_end(child, False, False, 0)
size_request = child.size_request()
return size_request.height
if self.toolmanager:
backend_tools.add_tools_to_manager(self.toolmanager)
if self.toolbar:
backend_tools.add_tools_to_container(self.toolbar)
self.statusbar = StatusbarGTK3(self.toolmanager)
h += add_widget(self.statusbar, False, False, 0)
h += add_widget(Gtk.HSeparator(), False, False, 0)
if self.toolbar is not None:
self.toolbar.show()
h += add_widget(self.toolbar, False, False, 0)
self.window.set_default_size(w, h)
def destroy(*args):
Gcf.destroy(num)
self.window.connect("destroy", destroy)
self.window.connect("delete_event", destroy)
if matplotlib.is_interactive():
self.window.show()
self.canvas.draw_idle()
def notify_axes_change(fig):
'this will be called whenever the current axes is changed'
if self.toolmanager is not None:
pass
elif self.toolbar is not None:
self.toolbar.update()
self.canvas.figure.add_axobserver(notify_axes_change)
self.canvas.grab_focus()
def save(self,
filename,
writer=None,
fps=None,
dpi=None,
codec=None,
bitrate=None,
extra_args=None,
metadata=None,
extra_anim=None):
'''
Saves a movie file by drawing every frame.
*filename* is the output filename, eg :file:`mymovie.mp4`
*writer* is either an instance of :class:`MovieWriter` or a string
key that identifies a class to use, such as 'ffmpeg' or 'mencoder'.
If nothing is passed, the value of the rcparam `animation.writer` is
used.
*fps* is the frames per second in the movie. Defaults to None,
which will use the animation's specified interval to set the frames
per second.
*dpi* controls the dots per inch for the movie frames. This combined
with the figure's size in inches controls the size of the movie.
*codec* is the video codec to be used. Not all codecs are supported
by a given :class:`MovieWriter`. If none is given, this defaults to the
value specified by the rcparam `animation.codec`.
*bitrate* specifies the amount of bits used per second in the
compressed movie, in kilobits per second. A higher number means a
higher quality movie, but at the cost of increased file size. If no
value is given, this defaults to the value given by the rcparam
`animation.bitrate`.
*extra_args* is a list of extra string arguments to be passed to the
underlying movie utiltiy. The default is None, which passes the
additional argurments in the 'animation.extra_args' rcParam.
*metadata* is a dictionary of keys and values for metadata to include
in the output file. Some keys that may be of use include:
title, artist, genre, subject, copyright, srcform, comment.
*extra_anim* is a list of additional `Animation` objects that should
be included in the saved movie file. These need to be from the same
`matplotlib.Figure` instance. Also, animation frames will just be
simply combined, so there should be a 1:1 correspondence between
the frames from the different animations.
'''
# Need to disconnect the first draw callback, since we'll be doing
# draws. Otherwise, we'll end up starting the animation.
if self._first_draw_id is not None:
self._fig.canvas.mpl_disconnect(self._first_draw_id)
reconnect_first_draw = True
else:
reconnect_first_draw = False
if fps is None and hasattr(self, '_interval'):
# Convert interval in ms to frames per second
fps = 1000. / self._interval
# If the writer is None, use the rc param to find the name of the one
# to use
if writer is None:
writer = rcParams['animation.writer']
# Re-use the savefig DPI for ours if none is given
if dpi is None:
dpi = rcParams['savefig.dpi']
if codec is None:
codec = rcParams['animation.codec']
if bitrate is None:
bitrate = rcParams['animation.bitrate']
all_anim = [self]
if not extra_anim is None:
all_anim.extend(anim for anim in extra_anim
if anim._fig is self._fig)
# If we have the name of a writer, instantiate an instance of the
# registered class.
if is_string_like(writer):
if writer in writers.avail:
writer = writers[writer](fps,
codec,
bitrate,
extra_args=extra_args,
metadata=metadata)
else:
import warnings
warnings.warn("MovieWriter %s unavailable" % writer)
writer = writers.list()[0]
verbose.report('Animation.save using %s' % type(writer),
level='helpful')
# Create a new sequence of frames for saved data. This is different
# from new_frame_seq() to give the ability to save 'live' generated
# frame information to be saved later.
# TODO: Right now, after closing the figure, saving a movie won't
# work since GUI widgets are gone. Either need to remove extra code
# to allow for this non-existant use case or find a way to make it work.
with writer.saving(self._fig, filename, dpi):
for data in itertools.izip(
*[a.new_saved_frame_seq() for a in all_anim]):
for anim, d in zip(all_anim, data):
#TODO: Need to see if turning off blit is really necessary
anim._draw_next_frame(d, blit=False)
writer.grab_frame()
# Reconnect signal for first draw if necessary
if reconnect_first_draw:
self._first_draw_id = self._fig.canvas.mpl_connect(
'draw_event', self._start)
def buffer_rgba(self):
if __debug__:
verbose.report('RendererAgg.buffer_rgba', 'debug-annoying')
return self._renderer.buffer_rgba()
latexh.write(s)
except UnicodeEncodeError, err:
verbose.report("You are using unicode and latex, but have "
"not enabled the matplotlib 'text.latex.unicode' "
"rcParam.", 'helpful')
raise
latexh.close()
# the split drive part of the command is necessary for windows users with
# multiple
if sys.platform == 'win32': precmd = '%s &&'% os.path.splitdrive(tmpdir)[0]
else: precmd = ''
command = '%s cd "%s" && latex -interaction=nonstopmode "%s" > "%s"'\
%(precmd, tmpdir, latexfile, outfile)
verbose.report(command, 'debug')
exit_status = os.system(command)
fh = file(outfile)
if exit_status:
raise RuntimeError('LaTeX was not able to process your file:\
\nHere is the full report generated by LaTeX: \n\n%s'% fh.read())
else: verbose.report(fh.read(), 'debug')
fh.close()
os.remove(outfile)
command = '%s cd "%s" && dvips -q -R0 -o "%s" "%s" > "%s"'%(precmd, tmpdir,
os.path.split(psfile)[-1], os.path.split(dvifile)[-1], outfile)
verbose.report(command, 'debug')
exit_status = os.system(command)
fh = file(outfile)
if exit_status: raise RuntimeError('dvips was not able to \
def tostring_argb(self):
if __debug__:
verbose.report('FigureCanvasAgg.tostring_argb', 'debug-annoying')
return self.renderer.tostring_argb()
from numpy import angle
def typecode(a):
return a.dtype.char
def iscontiguous(a):
return a.flags.contiguous
def byteswapped(a):
return a.byteswap()
def itemsize(a):
return a.itemsize
verbose.report('numerix %s' % version)
# a bug fix for blas numeric suggested by Fernando Perez
matrixmultiply = dot
asum = sum
def _import_fail_message(module, version):
"""Prints a message when the array package specific version of an extension
fails to import correctly.
"""
_dict = {"which": which[0], "module": module, "specific": version + module}
print """
The import of the %(which)s version of the %(module)s module,
%(specific)s, failed. This is is either because %(which)s was
unavailable when matplotlib was compiled, because a dependency of
%(specific)s could not be satisfied, or because the build flag for
def buffer_rgba(self):
if __debug__:
verbose.report('FigureCanvasAgg.buffer_rgba', 'debug-annoying')
return self.renderer.buffer_rgba()