Thread: [Matplotlib-users] range for log scale

Is it possible to have in Matplotlib.pyplot a log (base 10) scale that 
does go from xmin to xmax where xmin and xmax are not powers of 10 (as 
in Excel and OOCalc)?? E.g. a scale from 20 to 2500 like you can do in 
SciDAVis (and Origin and Mathematica) "Scale/from  and Scale/to".
I hope so,
Thanks, Janwillem

Janwillem van Dijk wrote:
> Is it possible to have in Matplotlib.pyplot a log (base 10) scale that 
> does go from xmin to xmax where xmin and xmax are not powers of 10 ...

yes.

best regards,
sebastian.

Janwillem van Dijk wrote:
> Is it possible to have in Matplotlib.pyplot a log (base 10) scale that 
> does go from xmin to xmax where xmin and xmax are not powers of 10 (as 
> in Excel and OOCalc)?? E.g. a scale from 20 to 2500 like you can do in 
> SciDAVis (and Origin and Mathematica) "Scale/from  and Scale/to".

Example using "ipython -pylab":

In [1]:x = arange(2.5, 250)

In [2]:y = x**2

In [3]:semilogy(x, y)
Out[3]:[<matplotlib.lines.Line2D object at 0x91ddc8c>]

In [4]:axis('tight')
Out[4]:(2.5, 249.5, 6.25, 62250.25)

In [5]:axis(ymin=5, ymax=70000)
Out[5]:(2.5, 249.5, 5, 70000)

OK, that was with y, but it works the same with x.

Eric


> I hope so,
> Thanks, Janwillem
> 
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P.S.
I noted that the new versions of OOcalc and Exel, 3.0 and 2007, now do allow
log scales other than in decades.


Janwillem wrote:
> 
> Is it possible to have in Matplotlib.pyplot a log (base 10) scale that 
> does go from xmin to xmax where xmin and xmax are not powers of 10 (as 
> in Excel and OOCalc)?? E.g. a scale from 20 to 2500 like you can do in 
> SciDAVis (and Origin and Mathematica) "Scale/from  and Scale/to".
> I hope so,
> Thanks, Janwillem
> 
> ------------------------------------------------------------------------------
> Come build with us! The BlackBerry® Developer Conference in SF, CA
> is the only developer event you need to attend this year. Jumpstart your
> developing skills, take BlackBerry mobile applications to market and stay 
> ahead of the curve. Join us from November 9-12, 2009. Register
> now!
> http://p.sf.net/sfu/devconf
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
> 
> 

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