python - Animated Line Graph gets ValueError: x and y must have same first dimension at runtime -

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i trying create animated line graph of half lives, text files referenced this:

decay1.txt:

2000 1000 500 250 125 63 31 16 8 4 0

decay2.txt reverse of decay1.txt.

any appreciated, believe how pulling data arrays create y axis. data enter when prompted 2000 10.

import numpy np import matplotlib.pyplot plt import matplotlib.animation animation  fig = plt.figure() totalnumber_of_nuclei = int(input("enter total number of nuclei"))#user input totalnumber of nuclei(max y) totaltime = int(input("enter total time simulation"))#user input totaltime (max x) timescale = np.arange(0., (totaltime+1.) ,1.)#time between plots - distance on x between plots ax = plt.axes(xlim=(0, totaltime), ylim=(0, totalnumber_of_nuclei))  def animate(i):     pulldata1 = open("decay1.txt","r").read()     pulldata2 = open("decay2.txt","r").read()     dataarray1 = pulldata1.split("\n")     dataarray2 = pulldata2.split("\n")     print(int(dataarray1[i]),int(dataarray2[i]))     y1 = []     y2 = []     x = timescale     if len(dataarray1[i])>1:         y1.append(int(dataarray1[i]))     if len(dataarray2[i])>1:         y2.append(int(dataarray2[i]))     ax.plot(x, y1, "b-", marker="o", label="decay1")     ax.plot(x, y2, "r-", marker="o", label="decay2")  ax.legend(loc='upper left', frameon=false) plt.ylabel("number of nuclei")#label y axis number of nuclei plt.xlabel("time")#label x axis time ani = animation.funcanimation(fig, animate, interval=1000, blit=true) plt.show()#display graph

error print out:

python 3.3.5 (v3.3.5:62cf4e77f785, mar  9 2014, 10:35:05) [msc v.1600 64 bit (amd64)] on win32 type "copyright", "credits" or "license()" more information. >>> ================================ restart ================================ >>>  enter total number of nuclei2000 enter total time simulation10  warning (from warnings module):   file "c:\python33\lib\site-packages\matplotlib\axes\_axes.py", line 475     warnings.warn("no labelled objects found. " userwarning: no labelled objects found. use label='...' kwarg on individual plots. 2000 0 traceback (most recent call last):   file "c:\users\ruari\documents\school work\dropbox\comp 4\tutorial.py", line 30, in <module>     ani = animation.funcanimation(fig, animate, interval=1000, blit=true)   file "c:\python33\lib\site-packages\matplotlib\animation.py", line 1067, in __init__     timedanimation.__init__(self, fig, **kwargs)   file "c:\python33\lib\site-packages\matplotlib\animation.py", line 913, in __init__     *args, **kwargs)   file "c:\python33\lib\site-packages\matplotlib\animation.py", line 591, in __init__     self._init_draw()   file "c:\python33\lib\site-packages\matplotlib\animation.py", line 1092, in _init_draw     self._draw_frame(next(self.new_frame_seq()))   file "c:\python33\lib\site-packages\matplotlib\animation.py", line 1106, in _draw_frame     self._drawn_artists = self._func(framedata, *self._args)   file "c:\users\ruari\documents\school work\dropbox\comp 4\tutorial.py", line 24, in animate     ax.plot(x, y1, "b-", marker="o", label="decay1")   file "c:\python33\lib\site-packages\matplotlib\axes\_axes.py", line 1373, in plot     line in self._get_lines(*args, **kwargs):   file "c:\python33\lib\site-packages\matplotlib\axes\_base.py", line 304, in _grab_next_args     seg in self._plot_args(remaining, kwargs):   file "c:\python33\lib\site-packages\matplotlib\axes\_base.py", line 282, in _plot_args     x, y = self._xy_from_xy(x, y)   file "c:\python33\lib\site-packages\matplotlib\axes\_base.py", line 223, in _xy_from_xy     raise valueerror("x , y must have same first dimension") valueerror: x , y must have same first dimension >>>


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