def findtrans(name, atomdat):
""" Given an ion and wavelength and list of transitions read with
readatom(), return the best matching entry in atom.dat.
>>> name, tr = findtrans('CIV 1550', atomdat)
"""
i = 0
name = name.strip()
if name[:4] in ['H2J0','H2J1','H2J2','H2J3','H2J4','H2J5']:
i = 4
else:
while name[i].isalpha() or name[i] == '*': i += 1
ion = name[:i]
wa = float(name[i:])
# must be sorted lowest to highest for indexnear
isort = np.argsort(atomdat[ion].wa)
sortwa = atomdat[ion].wa[isort]
ind = indexnear(sortwa, wa)
tr = atomdat[ion][isort[ind]]
# Make a short string that describes the transition, like 'CIV 1550'
wavstr = ('%.1f' % tr['wa']).split('.')[0]
trstr = '%s %s' % (ion, wavstr)
return trstr, atomdat[ion][isort[ind]]
def on_keypress(self, event):
""" Add or remove a continuum point.
Updates:
self.contpoints
"""
if event.key == 'q':
for item in self.connections:
self.fig.canvas.mpl_disconnect(item)
self.contpoints = None
self.continuum = None
self.finished = True
return
if event.key == 'k':
for item in self.connections:
self.fig.canvas.mpl_disconnect(item)
self.finished = True
return
if event.inaxes != self.fig.axes[0]: return
if event.key == 'a':
# add a point to contpoints
x,y = event.xdata,event.ydata
if x not in zip(*self.contpoints)[0]:
self.contpoints.append((x,y))
self.update()
elif event.key == 'd':
# remove a point from contpoints
contx,conty = zip(*self.contpoints)
sep = np.hypot(event.xdata - contx, event.ydata - conty)
self.contpoints.remove(self.contpoints[sep.argmin()])
self.update()
elif event.key == 'b':
# Add a break to the continuum.
self.breaks.append(event.xdata)
self.breaks.sort()
self.update()
elif event.key == 'r':
# remove a break
i = indexnear(self.breaks, event.xdata)
if i not in (0, len(self.breaks)-1):
self.breaks.remove(self.breaks[i])
self.update()
elif event.key == 's':
c = raw_input('New FWHM in pixels of Gaussian to convolve with? '
'(blank for no smoothing) ')
if c == '':
# restore spectrum
self.smoothby = None
self.update()
else:
try:
fwhm = float(c)
except TypeError:
print 'FWHM must be a floating point number >= 1'
if fwhm < 1:
self.smoothby = None
else:
self.smoothby = fwhm
self.update()
elif event.key == '?':
print self.help_message
