"""Use this script to analyse data from the gammaMotionNull.py
script. 

Instructions: From the dialogue box select multiple staircases (Cmd-click
or shift-click) to plot the results
"""

#analyse standard staircase data
import matplotlib; matplotlib.use('TKAgg')
from psychopy import data, gui, misc, core
import pylab
import numpy as num

files = gui.fileOpenDlg('.')
if not files:
    core.quit()

#get the data from all the files
allIntensities, allResponses = [],[]
for thisFileName in files:
    thisDat = misc.fromFile(thisFileName)
    assert isinstance(thisDat, data.StairHandler)
    allIntensities.append( thisDat.intensities )
    allResponses.append( thisDat.data )
    
#plot each staircase
pylab.subplot(121)
lines, names = [],[]
for fileN, thisStair in enumerate(allIntensities):
    #lines.extend(pylab.plot(thisStair))
    #names = files[fileN]
    pylab.plot(thisStair, label=files[fileN])
#pylab.legend()

#get combined data
combinedInten, combinedResp, combinedN = \
             data.functionFromStaircase(allIntensities, allResponses, 7)
#fit curve
guess= [num.average(combinedInten), num.average(combinedInten)/5]

fit = data.FitFunction('weibullYN',combinedInten, combinedResp, guess=guess)
smoothInt = num.arange(min(combinedInten), max(combinedInten), 0.001)
smoothResp = fit.eval(smoothInt)
thresh = fit.inverse(0.5)
print thresh

#plot curve
pylab.subplot(122)
pylab.plot(smoothInt, smoothResp, '-')
pylab.plot([thresh, thresh],[0,0.5],'--'); pylab.plot([0, thresh],[0.5,0.5],'--')
pylab.title('threshold = %0.3f' %(thresh))
#plot points
pylab.plot(combinedInten, combinedResp, 'o')
pylab.ylim([0,1])

pylab.show()
    

    