matplotlib set yaxis label size


How can I change the size of only the yaxis label? Right now, I change the size of all labels using

pylab.rc('font', family='serif', size=40)

but in my case, I would like to make the y-axis label larger than the x-axis. However, I'd like to leave the tick labels alone.

I've tried, for example:


but I only get:

AttributeError: 'str' object has no attribute 'set_fontsize'

So, obviously that doesn't work. I've seen lots of stuff for tick sizes, but nothing for the axis labels themselves.

This question is tagged with python matplotlib label graphing

~ Asked on 2012-05-01 21:39:26

The Best Answer is


If you are using the 'pylab' for interactive plotting you can set the labelsize at creation time with pylab.ylabel('Example', fontsize=40).

If you use pyplot programmatically you can either set the fontsize on creation with ax.set_ylabel('Example', fontsize=40) or afterwards with ax.yaxis.label.set_size(40).

~ Answered on 2012-05-01 21:51:14

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