how to visualize values on logarithmic scale on matplotalib?

Question

I have vales with very small difference like... 0.000001. I want to visualize them on logarithmic scale. I am wondering how to do it in matplotlib.

Thanks a lot

Answer 1

http://matplotlib.sourceforge.net/api/pyplot_api.html#matplotlib.pyplot.axis

Simply add the keyword argument log=True

Or, in an example:

from matplotlib import pyplot
import math
pyplot.plot([x for x in range(100)],[math.exp(y) for y in range(100)] )
pyplot.xlabel('arbitrary')
pyplot.ylabel('arbitrary')
pyplot.title('arbitrary')

#pyplot.xscale('log')
pyplot.yscale('log')

pyplot.show()

Answer 2

Since all other answers only mention the global pyplot.xscale("log") approach: You can also set it per axis, but then the syntax is:

ax.set_yscale("log")

Answer 3

You can use this piece of code:

import matplotlib.pyplot
# to set x-axis to logscale
matplotlib.pyplot.xscale('log')
# to set y-axis to logscale
matplotlib.pyplot.yscale('log')