How can I plot an errorbar plot in python, having for y different errors up and down? I have x,y, and the values for each error in different lists. I tried this but it doesn't work:
plt.errorbar(x,y,[std_y_down,std_y_up],"r^")
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1 Answer
The error you probably got is reasonably informative:
ValueError: yerr must be a scalar, the same dimensions as y, or 2xN.
In other words, if you want different plus and minus errors you need a pair of sequences, each of the same length as your data e.g.:
plt.errorbar(x,y,yerr=[[0.5]*len(x),[1.5]*len(x)],fmt='r^')
