matplotlib-users

[Matplotlib-users] Ways to customize the legend

[Sascha S. <sc...@te...>]

Hi everybody,

I'm new to this list, so please don't be too impatient...

I would like to know which possibilities I have to customize the legend. =
I already found how to change the font size using font_manager and FontPr=
operties. What I'd like to have is a slight gray legend background. Is th=
is possible?

Greetings,
Sascha

Re: [Matplotlib-users] Ways to customize the legend

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

>>>>> "Sascha" == Sascha Schnepp <sc...@te...> writes:

    Sascha> Hi everybody, I'm new to this list, so please don't be too
    Sascha> impatient...

    Sascha> I would like to know which possibilities I have to
    Sascha> customize the legend. I already found how to change the
    Sascha> font size using font_manager and FontProperties. What I'd
    Sascha> like to have is a slight gray legend background. Is this
    Sascha> possible?

Hi Sascha,

The way to customize the legend is to get the legend instance back
from the legend command.  Then you can call any of the methods
available for the legend.  You can read about these by doing from the
python shell

 >>> leg = legend(blha, blah)
 >>> help(leg)

or reading the site documentation at
http://matplotlib.sourceforge.net/matplotlib.legend.html#Legend .  To
customize the rectangular box around the legend, use

  >>> rect = leg.get_frame()

rect is a Rectangle instance, documented at
http://matplotlib.sourceforge.net/matplotlib.patches.html#Rectangle . 

To change the facecolor to gray, you need to call

  >>> rect.set_facecolor(0.8)  # a grayscale intensity

or

  >>> rect.set_facecolor('gray')

There are many wanys to set colors in matplotlib, these are discussed
at http://matplotlib.sourceforge.net/matplotlib.pylab.html#-colors

In particular, see examples/legend_demo.py that comes with the
matplotlib source distribution (and is also available here
http://matplotlib.sourceforge.net/matplotlib_examples_0.74.zip ).
This example shows you how to set the background color and more.

Hope this helps,
JDH

Re[2]: [Matplotlib-users] Ways to customize the legend

[Alan G I. <ai...@am...>]

On Wed, 06 Apr 2005, John Hunter apparently wrote: 
>   >>> rect.set_facecolor(0.8)  # a grayscale intensity 

...

> There are many wanys to set colors in matplotlib, these are discussed 
> at http://matplotlib.sourceforge.net/matplotlib.pylab.html#-colors 


I do not see any discussion of grayscale at that location.

Grayscale does work mostly as expected once one knows about 
it.

Exception: integer values are not welcome.
(E.g., pylab tries to treat 0 as part of an RGB 
specification.)

Cheers,
Alan Isaac