Strange default choice of ylabel ticks

Community matplotlib-users
1

Hi all

I get a rather strange scaling / choice of y-axis ticks for the following script:

import pylab as pl

some_points = [0.94589396231920286, 0.94593953605915637, 0.94601787712257401, 0.94597530431819743, 0.9459922123931529, 0.94622433138703055]

pl.plot(some_points, ‘.-’)

pl.savefig(‘some_point2.pdf’)

output here:

http://dl.dropbox.com/u/2244215/some_point2.pdf

This is a rather simple plot, but matplotlib choses a strange scaling of the y-axis by default. How do I get a more standard scaling without specifying the yticks manually?

Best

Per

2

Hi Per,

I think you want to use the ‘ticklabel_format’ method:

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

Here’s your example modified some. ‘some_point2A.pdf’ produces exactly the same as the default. ‘some_point2B.pdf’ does not use an offset, and maybe produces more of what you were looking for.

import pylab as pl

some_points = [0.94589396231920286, 0.94593953605915637, 0.94601787712257401, 0.94597530431819743, 0.9459922123931529, 0.94622433138703055]
pl.plot(some_points, ‘.-’)

pl.ticklabel_format(style=‘plain’,useOffset=0.9458,axis=‘y’)

pl.savefig(‘some_point2A.pdf’)
pl.ticklabel_format(style=‘plain’,useOffset=False,axis=‘y’)
pl.savefig(‘some_point2B.pdf’)

-Yann

···

On Wed, Jan 18, 2012 at 4:15 AM, Per Nielsen <evilper@…287…> wrote:

Hi all

I get a rather strange scaling / choice of y-axis ticks for the following script:

import pylab as pl

some_points = [0.94589396231920286, 0.94593953605915637, 0.94601787712257401, 0.94597530431819743, 0.9459922123931529, 0.94622433138703055]

pl.plot(some_points, ‘.-’)

pl.savefig(‘some_point2.pdf’)

output here:

http://dl.dropbox.com/u/2244215/some_point2.pdf

This is a rather simple plot, but matplotlib choses a strange scaling of the y-axis by default. How do I get a more standard scaling without specifying the yticks manually?

Best

Per

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