matplotlib-users

[Matplotlib-users] matplotlib priorities

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

Perry Greenfield has spent a fair amount of time talking with me and
the folks working at stsci on matplotlib to come up with a set of
goals and priorities for near term development, and has thoroughly
revamped the goals page

  http://matplotlib.sourceforge.net/goals.html

We hope that this page will stay much more current than the last page,
which grew fairly static as most of the goals at the time the page was
created were fulfilled.

Take a look over the list and speak up for anything we may have
overlooked.  

JDH

Re: [Matplotlib-users] matplotlib priorities

[Al S. <a.d...@wo...>]

On Mon, 2004-05-03 at 17:17, John Hunter wrote:
> Perry Greenfield has spent a fair amount of time talking with me and
> the folks working at stsci on matplotlib to come up with a set of
> goals and priorities for near term development, and has thoroughly
> revamped the goals page
> 
>   http://matplotlib.sourceforge.net/goals.html
> 
> We hope that this page will stay much more current than the last page,
> which grew fairly static as most of the goals at the time the page was
> created were fulfilled.
> 
> Take a look over the list and speak up for anything we may have
> overlooked.  
> 
> JDH

Just so it doesn't slip through the cracks, please add support for
multi-line text (embedded '\n's) especially in ticklabels to the near
term goals.

Thanks.

	-Al Schapira

Re: [Matplotlib-users] matplotlib priorities

[Humufr <hu...@ya...>]

There are something I did't see in the list (but perhaps it's possible 
to do now) and that I think will be useful for astronomer. it's to plot 
an image with axes in astronomical unit (RA and Dec)

like this function in pgplot:

http://www.astro.caltech.edu/~tjp/pgplot/subroutines.html#PGTBOX

thanks for this software who are very good,

          Nicolas Gruel


John Hunter wrote:

>Perry Greenfield has spent a fair amount of time talking with me and
>the folks working at stsci on matplotlib to come up with a set of
>goals and priorities for near term development, and has thoroughly
>revamped the goals page
>
>  http://matplotlib.sourceforge.net/goals.html
>
>We hope that this page will stay much more current than the last page,
>which grew fairly static as most of the goals at the time the page was
>created were fulfilled.
>
>Take a look over the list and speak up for anything we may have
>overlooked.  
>
>JDH
>
>
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Re: [Matplotlib-users] matplotlib priorities

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

>>>>> "Humufr" == Humufr  <hu...@ya...> writes:

    Humufr> There are something I did't see in the list (but perhaps
    Humufr> it's possible to do now) and that I think will be useful
    Humufr> for astronomer. it's to plot an image with axes in
    Humufr> astronomical unit (RA and Dec)

    Humufr> like this function in pgplot:

    Humufr> http://www.astro.caltech.edu/~tjp/pgplot/subroutines.html#PGTBOX

    Humufr> thanks for this software who are very good,

The new ticker code was designed to support exactly this kind of
application.  The documentation
http://matplotlib.sourceforge.net/matplotlib.ticker.html details this
process.  That code defines a lot of preset tick locators and
formatters but was primarily designed to be user extensible.

Since I'm not an astronomer, I'm probably not the best person to write
this, but it would be fairly easy to subclass
matplotlib.ticker.Locator and matplotlib.ticker.Formatter to provide
exactly this functionality.

Here is a simple example showing how to use a user defined function to
format the ticks (millions of dollars in this case)

    from matplotlib.ticker import FuncFormatter
    from matplotlib.matlab import *

    x =     arange(4)
    money = [1.5e5, 2.5e6, 5.5e6, 2.0e7]

    def millions(x, pos):
        'The two args are the value and tick position'
        return '$%1.1fM' % (x*1e-6)

    formatter = FuncFormatter(millions)

    ax = subplot(111)
    ax.yaxis.set_major_formatter(formatter)
    bar(x, money)
    ax.set_xticks( x + 0.5)
    ax.set_xticklabels( ('Bill', 'Fred', 'Mary', 'Sue') )
    show()

In you case however, you would probably want to define new classes
that derive from Locator and Formatter (you can follow the example of
the many custom locators and formatters in matplotlib.ticker).  If you
do, please send the classes in with an example so I can include them
in the standard distribution.  If you don't want to do this, I'm sure
one of the stsci guys will do this since they have expressed interest
in this as well.

JDH

RE: [Matplotlib-users] matplotlib priorities

[Perry G. <pe...@st...>]

John Hunter wrote:
> 
>     Humufr> There are something I did't see in the list (but perhaps
>     Humufr> it's possible to do now) and that I think will be useful
>     Humufr> for astronomer. it's to plot an image with axes in
>     Humufr> astronomical unit (RA and Dec)
> 
>     Humufr> like this function in pgplot:
> 
>     Humufr> 
> http://www.astro.caltech.edu/~tjp/pgplot/subroutines.html#PGTBOX
> 
>     Humufr> thanks for this software who are very good,
> 
> The new ticker code was designed to support exactly this kind of
> application.  The documentation
> http://matplotlib.sourceforge.net/matplotlib.ticker.html details this
> process.  That code defines a lot of preset tick locators and
> formatters but was primarily designed to be user extensible.
> 
> Since I'm not an astronomer, I'm probably not the best person to write
> this, but it would be fairly easy to subclass
> matplotlib.ticker.Locator and matplotlib.ticker.Formatter to provide
> exactly this functionality.
> 
We are astronomers and we do intend to write tools to allow this.
We haven't done this yet but it is fairly high on our list
of things to do. I didn't think that such a specialized thing
was needed on the generalized goals. You are welcome to
write one if you need it sooner of course.

Perry Greenfield

Re: [Matplotlib-users] matplotlib priorities

[Srinath A. <sr...@fa...>]

On Mon, 3 May 2004, John Hunter wrote:

>   http://matplotlib.sourceforge.net/goals.html
>
> Take a look over the list and speak up for anything we may have
> overlooked.
>
A few feature requests :)

1. Solve the problem where the lines are not displayed correctly when
   the axis limits after zooming are much smaller than the axis limits
   when the plot is first created. This has something to do with the
   backends not being able to handle negative coordinates.

2. Enable zooming in both X and Y with the mouse by allowing the user to
   choose a rectangle. This might behave like the matlab "zoom" function
   taking arguments like
        zoom xon
        zoom yon
        zoom
    I did a simple implementation of this for the GTK backend, but
    a more general implementation could be done easily depending on the
    already planned "Cursor read function" enhancement.

Srinath