/
DataHandling.py
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DataHandling.py
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import numpy as np
from uncertainties import ufloat,unumpy
from scipy import stats
import os, sys
sys.path.append('/lab/software/apparatus3/py')
import statdat, qrange
from scipy.interpolate import interp1d
def data_fetch( datakeys, gdat, **kwargs ):
save = kwargs.get('save', False)
fmt = kwargs.get('fmt', '%9.4g')
print "Fetching data..."
for k in gdat.keys():
try:
gdat[k]['data'] = np.loadtxt(k+'.dat')
print "Loaded %s succesfully." % k
except:
data, errmsg, rawdat = qrange.qrange_eval( gdat[k]['dir'], gdat[k]['shots'], datakeys)
if save:
np.savetxt(k+'.dat', data, fmt=fmt)
gdat[k]['data'] = data
print "Done."
K = lambda key: datakeys.index(key)
return gdat, K
def data_pick( dat, conds, K):
dat1 = np.array(np.copy(dat))
#return dat1
for c in conds:
Kc = K(c[0])
cval = c[1]
if len(dat1) > 0 :
try:
if len(c) == 2:
dat1 = dat1[ dat1[:,Kc] == cval ]
elif len(c) == 3:
if c[2] == '>':
dat1 = dat1[ dat1[:,Kc] > cval ]
elif c[2] == '<':
dat1 = dat1[ dat1[:,Kc] < cval ]
elif c[2] == '=':
dat1 = dat1[ dat1[:,Kc] == cval ]
elif c[2] == '>=':
dat1 = dat1[ dat1[:,Kc] >= cval ]
elif c[2] == '<=':
dat1 = dat1[ dat1[:,Kc] <= cval ]
elif c[2] == '!=':
dat1 = dat1[ dat1[:,Kc] != cval ]
except:
print "Condition failed:"
print "key index = ", Kc
print "looking for cval = ",cval
print "in ", dat1
raise
return dat1
def data_ratio( dat, cond1, cond2, K, Xkey, Ykey, **kwargs):
# First get the data for each condition
dat1 = data_pick( dat, cond1, K)
dat2 = data_pick( dat, cond2, K)
# Then determine the x values they have in common
x1= np.unique(dat1[:,K(Xkey)])
x2= np.unique(dat2[:,K(Xkey)])
set1 = set( x1.tolist())
set2 = set( x2.tolist())
common = sorted(list( set1 & set2 ))
# Decide which operation will be performed on the two sets
operation = kwargs.get( 'operation', 'ratio')
# Then loop through the common x values to get the
# quantities of interest
num = dat1 ; den = dat2 ;
rval = []; rerr = [] ; nsamples=[]
for c in common:
numi = num[ num[:,K(Xkey)] == c ][ :, K(Ykey) ]
deni = den[ den[:,K(Xkey)] == c ][ :, K(Ykey) ]
ns = max( len(numi), len(deni))
if operation == 'ratio':
val = ufloat(( np.mean(numi), stats.sem(numi) )) / ufloat(( np.mean(deni), stats.sem(deni) ))
elif operation == 'sum':
val = ufloat(( np.mean(numi), stats.sem(numi) )) + ufloat(( np.mean(deni), stats.sem(deni) ))
else:
raise Exception('undefined operation in DataHandling.data_ratio' )
rval.append( val.nominal_value )
rerr.append( val.std_dev() )
# nsamples.append( ns ) # Changed the behaviour of nsamples 140428
nsamples.append( [len(numi), len(deni)] )
rval = np.array( rval )
rerr = np.array( rerr )
xc = np.array(common)
return xc, rval, rerr, nsamples
def average_errdata( sets ):
xsets = []
for s in sets:
xsets.append( set( s[0].tolist()) )
# Determine the x values they are common for all sets
common = set.intersection( *xsets )
def inset(x, xset):
if x in xset:
return True
X=[]; Y=[]; YERR=[];
for s in sets:
xs = []; ys = []; yerrs=[];
for i in range( len(s[0] )):
if s[0][i] in common:
xs.append( s[0][i] )
ys.append( s[1][i] )
yerrs.append( s[2][i] )
xs = np.array( xs )
ys = np.array( ys )
yerrs = np.array( yerrs)
index = np.argsort (xs )
X.append( xs[ index ] )
Y.append( ys[ index ] )
YERR.append( yerrs[ index] )
X = np.array(X)
Y = np.array(Y)
YERR = np.array(YERR)
#print "\nX="
#print X
#print "\nY="
#print Y
#print "\nYERR="
#print YERR
# Perform weighted average
weights = 1/ np.power( YERR, 2. )
y_wav = np.sum( Y * weights , axis=0) / np.sum(weights, axis=0 )
y_err_wav = 1./ np.sqrt( np.sum(weights, axis=0) )
#print "\nWeighted average"
#print y_wav
#print "\nError"
#print y_err_wav
return X[0], y_wav, y_err_wav
# PLOTTING FUNCTIONS
def plotkey( ax, gdict, K, fx, xkey, ykey, dat, base, **kwargs):
try:
defmarker = gdict['marker']
except:
defmarker = 'o'
marker = kwargs.get( 'marker', defmarker)
ms = kwargs.get( 'ms', 5. )
mew = kwargs.get( 'mew', 1.0 )
mec = kwargs.get( 'mec', gdict['ec'])
mfc = kwargs.get( 'mfc', gdict['fc'])
ew = kwargs.get( 'ew', 1.0 )
ecap = kwargs.get( 'ecap', 0. )
save = kwargs.get( 'save', False )
exceptions = kwargs.get( 'exceptions', False)
raw = kwargs.get( 'raw', True )
raw_offset = kwargs.get( 'raw_offset', 0.)
labelstr = kwargs.get( 'labelstr', gdict['label'] )
xkey0 = xkey
ykey0 = ykey
xkey = K(xkey)
ykey = K(ykey)
if kwargs.get('use_stddev', False):
error_index = 2 # standard deviation
else:
error_index = 3 # standard error
discard = kwargs.pop('discard',None)
if discard is not None:
if 'y>' in discard.keys():
dat = dat[ dat[:,ykey] < discard['y>'] ]
if 'y<' in discard.keys():
dat = dat[ dat[:,ykey] > discard['y<'] ]
try:
both_offset = kwargs.get('both_offset', 0.)
yf = kwargs.get( 'yf', None)
if yf is not None:
ydict = kwargs.get('yf_kwargs', {} )
yf_usex = kwargs.get('yf_usex', False)
if yf_usex is True:
ydict['x'] = fx(xc)
if raw:
rawcolor = kwargs.pop('rawcolor', 'gray')
rawalpha = kwargs.pop('rawalpha', 0.5)
rawms = kwargs.pop('rawalpha', 4.5)
xraw = fx(dat[:, xkey] ) + raw_offset + both_offset
yraw = dat[:,ykey]/base
if yf is not None:
yraw = yf( yraw, **ydict )
ax.plot( xraw, yraw , '.',
marker='.', ms=rawms,\
color=rawcolor, alpha=rawalpha)
datS = statdat.statdat( dat, xkey, ykey, **kwargs)
xplot = fx(datS[:,0])
yplot = datS[:,1]/base
yploterr = datS[:,error_index]/base
if yf is not None:
yunc = unumpy.uarray(( yplot, yploterr ))
yunc = yf( yunc, **ydict )
yplot = unumpy.nominal_values( yunc )
yploterr = unumpy.std_devs( yunc )
ax.errorbar( xplot+both_offset, yplot, yerr=yploterr,\
capsize=ecap, elinewidth=ew,\
fmt='.', ecolor=mec, mec=mec,\
mew=mew, marker=marker, mfc=mfc, ms=ms,\
label=labelstr)
guide = kwargs.get( 'guide', False)
if guide:
guide_color = kwargs.get('guide_color', mec)
f = interp1d( xplot, yplot, kind='linear')
xnew = np.linspace( xplot.min(), xplot.max(), 120)
ax.plot( xnew, f(xnew), color=guide_color, zorder = 1.1 )
if save:
fname = xkey0.replace(':','_') + '_' + labelstr[-3:] + '.rawdat'
X = np.transpose(np.vstack( ( xplot, yplot, yploterr )))
np.savetxt( fname, X, fmt='%10.2f', delimiter='\t', newline='\n')
if kwargs.get('return_raw', False):
return xraw, yraw
return xplot, unumpy.uarray(( yplot, yploterr ))
except:
print "Exception occured in plotkey %s vs %s"% (ykey0,xkey0)
if exceptions:
raise
def plotkey_relerr( ax, gdict, K, fx, xkey, ykey, dat, base, **kwargs):
try:
defmarker = gdict['marker']
except:
defmarker = 'o'
marker = kwargs.get( 'marker', defmarker)
ms = kwargs.get( 'ms', 5. )
mew = kwargs.get( 'mew', 1.0 )
mec = kwargs.get( 'mec', gdict['ec'])
mfc = kwargs.get( 'mfc', gdict['fc'])
save = kwargs.get( 'save', False )
exceptions = kwargs.get( 'exceptions', False)
raw = kwargs.get( 'raw', True )
raw_offset = kwargs.get( 'raw_offset', 0.)
labelstr = kwargs.get( 'labelstr', gdict['label'] )
xkey0 = xkey
ykey0 = ykey
xkey = K(xkey)
ykey = K(ykey)
try:
datS = statdat.statdat( dat, xkey, ykey )
Ystderr = datS[:,3]/base
Ystddev = datS[:,2]/base
X = datS[:,0]
Y = datS[:,1]/base
def meanY( x ):
try:
index = np.where( X == x )[0][0]
assert isinstance( index, int )
return Y[index]
except:
print "Error finding mean value of Y at X = ", x
raise
if raw:
datY = dat[:,ykey]/base
datX = dat[:,xkey]
datYnormed = np.array([ datY[i] / meanY( datX[i] ) \
for i in range(len(datX)) ] )
rawcolor = kwargs.pop('rawcolor', 'gray')
ax.plot( fx(datX)+raw_offset, datYnormed, '.',\
marker='.', ms=4.5,\
color=rawcolor, alpha=0.5)
ax.plot( fx(X), 100.*2.*Ystderr/Y, '.',\
mec=mec, mew=mew, marker=marker, mfc=mfc, ms=ms,\
label=labelstr)
#ax.plot( fx(X), 100.*Ystddev/Y, '.',\
# mec=mec, mew=mew, marker=marker, mfc=mfc, ms=ms,\
# label=labelstr)
if save:
fname = xkey0.replace(':','_') + '_' + labelstr[-3:] + 'RELERR.rawdat'
X = np.transpose(np.vstack( ( fx(datS[:,0]), datS[:,1]/base, datS[:,3]/base )))
np.savetxt( fname, X, fmt='%10.2f', delimiter='\t', newline='\n')
return fx(datS[:,0]), unumpy.uarray(( datS[:,1]/base, datS[:,3]/base ))
except:
print "Exception occured in plotkey %s vs %s"% (ykey0,xkey0)
if exceptions:
raise
return None
def plotkey_ratio( ax, gdict, K, fx, xkey, ykey, cond1, cond2, dat, base, **kwargs):
try:
defmarker = gdict['marker']
except:
defmarker = 'o'
marker = kwargs.get( 'marker', defmarker)
ms = kwargs.get( 'ms', 5. )
mec = kwargs.get( 'mec', gdict['ec'])
mfc = kwargs.get( 'mfc', gdict['fc'])
mew = kwargs.get( 'mew', 1.0 )
ew = kwargs.get( 'ew', 1.0 )
ecap = kwargs.get( 'ecap', 0. )
save = kwargs.get( 'save', False )
labelstr = kwargs.get( 'labelstr', gdict['label'] )
xoffset = kwargs.get( 'xoffset', 0.)
exceptions = kwargs.get( 'exceptions', False)
operation = kwargs.get( 'operation', 'ratio')
try:
xc, rval, rerr, nsamples = data_ratio( dat, cond1, cond2, K, xkey, ykey, \
operation=operation )
rval = rval / base
rerr = rerr / base
#print '\t%s: x points in common = '%ykey,len(xc)
yf = kwargs.get( 'yf', None)
if yf is not None:
ydict = kwargs.get('yf_kwargs', {} )
yf_usex = kwargs.get('yf_usex', False)
if yf_usex is True:
ydict['x'] = fx(xc)
runc = unumpy.uarray(( rval, rerr ))
runc = yf( runc, **ydict )
rval = unumpy.nominal_values( runc )
rerr = unumpy.std_devs( runc )
if len(xc) > 0:
## Debugging
#print "plotkey_ratio debug"
#print "len( x ) = ", len(fx(xc))
#print "len( y ) = ", len(rval/base)
#print "len( yerr ) = ", len(rerr/base)
ax.errorbar( fx(xc) + xoffset, rval/base, yerr=rerr/base,\
capsize=ecap, elinewidth=ew,\
fmt='.', ecolor=mec, mec=mec,\
mew=mew, marker=marker, mfc=mfc, ms=ms,\
label=labelstr)
ax_relerr = kwargs.get('ax_relerr', None)
if ax_relerr is not None:
mec_relerr = kwargs.get('mec_relerr', mec )
mew_relerr = kwargs.get('mec_relerr', mew )
marker_relerr = kwargs.get('mec_relerr', marker )
mfc_relerr = kwargs.get('mfc_relerr', mfc )
ms_relerr = kwargs.get('ms_relerr', ms )
ax_relerr.plot( fx(xc), 100.*2.*rerr/rval, '.',\
mec=mec_relerr, mew=mew_relerr, \
marker=marker_relerr, mfc=mfc_relerr, \
ms=ms_relerr,\
label=labelstr)
if save:
fname = xkey.replace(':','_') + '_' + labelstr[-3:] + '.rawdatNOTCorrected'
X = np.transpose(np.vstack( ( fx(xc), rval/base, rerr/base )))
np.savetxt( fname, X, fmt='%10.2f', delimiter='\t', newline='\n')
if kwargs.get('return_unumpy', False):
return {'x':fx(xc), 'y':unumpy.uarray(( rval/base, rerr/base)),\
'nsamples':nsamples }
else:
return [fx(xc), rval/base, rerr/base, nsamples]
except:
print "Exception occured in plotkey_ratio %s vs %s"%(ykey,xkey)
if exceptions:
raise