python - Round error when plotting -


i have following array of data:

in [53]: data out[53]: array([  9.95000000e-05,   9.95000000e-05,   9.95000000e-05,          ...          ...          9.95000000e-05])

when plot of get:

enter image description here

i expect plot straight line meaningful on y axis. cause behavior?

the problem 9.95000000e-05 9.9500000000000006e-05 or 9.9499999999999979e-05 or simmilar number ipython rounds sake of clarity.

matplotlib, however, acknowledge number in complete precision result has unexpected behaviour.

the workaround or round number values represented in ipython.

in [53]: round(data,7) out[53]: array([  9.95000000e-05,   9.95000000e-05,   9.95000000e-05,          ...           ...          ])

which provides nice plot:

in [54]: plot(round(data,7))

enter image description here


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