URGENT: How to plot data from text file. Trying to recreate plots from MATLAB

[JamieAl]

I have the following data saved from a MATLAB code and they have the following form:

0,0.001,0.002,0.003,0.004,0.005,0.006,0.007,0.008,0.009,0.01,0.011,0.012,0.013,0.014,0.015,0.016,0.017,0.018,..

and I am trying to recreate my plot from MATLAB that looks like:



So I have written the following python code that is not working:

XX, YY =[], []
for line in open('RhoMacCormack_sigpt05_cflpt5.txt','r'):
    values = [float(s) for s in line.split()]
    XX.append(values[0])
    YY.append(values[1])
    plt.plot(XX,YY)
    plt.show()

Gives the error:

ValueError: could not convert string to float: '0,0.001,0.002,0.003,0.004...

Could someone help me get this working?