matplotlib-users

[Matplotlib-users] better axis command?

[Shin <sd...@em...>]

As you know, in MATLAB, axis([-inf inf 0 10]) means that
the range of x-axis is determined automatically while
the range of y-axis is set manually to the range from 0 to 10.

In current Matplotlib, it seems there is no support for that kind of
partial range setting.
If so, how about adding a little intelligence on the axis function, like

>>> axis([None, None, 0, 10]).

And, any specific reason there is no xlim or ylim function?

-- 
Daehyok Shin (Peter)
Geography Department
Univ. of North Carolina-Chapel Hill

Re: [Matplotlib-users] better axis command?

[John H. <jdh...@ac...>]

>>>>> "Shin" == Shin  <sd...@em...> writes:

    Shin> As you know, in MATLAB, axis([-inf inf 0 10]) means that the
    Shin> range of x-axis is determined automatically while the range
    Shin> of y-axis is set manually to the range from 0 to 10.

    Shin> In current Matplotlib, it seems there is no support for that
    Shin> kind of partial range setting.  If so, how about adding a
    Shin> little intelligence on the axis function, like

    >>>> axis([None, None, 0, 10]).

This is certainly easy enough  - does matlab also support

    >> axis([-inf, 5, 0, 10]).

in which case on the lower xlim is set automatically and the upper
xlim is 5?

    Shin> And, any specific reason there is no xlim or ylim function?

I didn't know matlab had them :-( I'll add them.  In the meantime:

  ax.set_xlim((xmin, xmax))

or 
  
  set(gca(), 'xlim', (xmin, xmax))

or 

  set(ax, xlim=(xmin, xmax))

and so on ...


    Shin> -- Daehyok Shin (Peter) Geography Department Univ. of North
    Shin> Carolina-Chapel Hill



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RE: [Matplotlib-users] better axis command?

[Shin, D. <sd...@em...>]

> -----Original Message-----
> From: John Hunter [mailto:jdh...@ni...]
> Sent: Thursday, August 12, 2004 AM 8:49
> To: Shin
> Cc: matplotlib-users
> Subject: Re: [Matplotlib-users] better axis command?
>
>
>
> This is certainly easy enough  - does matlab also support
>
>     >> axis([-inf, 5, 0, 10]).
>
> in which case on the lower xlim is set automatically and the upper
> xlim is 5?

Yes. In my opinion, Using None is better than inf
because inf should be imported seperately in numarray
(from numarray.ieeespecial import nan, inf).

> I didn't know matlab had them :-( I'll add them.  In the meantime:
>

The xlim and ylim are ones I frequently use to adjust axis ranges.
I am quite sure many users will like the addition.
Note that xlim and ylim change only one axis without touching other axes,
such as automatic scaling.
Glad to contribute something to Matplotlib. Thanks for your effort.

Daehyok Shin