matplotlib-users

[Matplotlib-users] title and colorbar size

[Petr D. <da...@uc...>]

Hello,
i'd like to ask two questions:

1) Is it possible to control amount of space between title and graph?

2) When set_aspect() is used, the size of colorbar does not respect
y-dimension of the graph. (See the attached example.) Is it possible to
set the size of the colorbar directly?

Petr Danecek

Re: [Matplotlib-users] title and colorbar size

[Jeff W. <js...@fa...>]

Petr Danecek wrote:
> Hello,
> i'd like to ask two questions:
>
> 1) Is it possible to control amount of space between title and graph?
>   

Petr:  The title command takes 'x' and 'y' keyword arguments that set 
the position of the title in axis coordinates.  For example, try 
'y=1.075' to move the title up a bit.
> 2) When set_aspect() is used, the size of colorbar does not respect
> y-dimension of the graph. (See the attached example.) Is it possible to
> set the size of the colorbar directly?
>   
I usually use the 'shrink' keyword to adjust the colorbar in situations 
like this.  You have to fiddle with it a bit to get the right value.  In 
your case, 'shrink=0.4' ought to do it. 

-Jeff


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Re: [Matplotlib-users] title and colorbar size

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

>>>>> "Petr" == Petr Danecek <da...@uc...> writes:

    Petr> Hello, i'd like to ask two questions:

    Petr> 1) Is it possible to control amount of space between title
    Petr> and graph?

The y value of the title instance is in axes coordinates, so 1 is the
top of the axes, and numbers greater than 1 are further above the
top.  So you can do

t.set.y(1.1)

where t is the matplotlib.text.Text instance returned from pylab
'title' or from matplotlib.axes.Axes.set_title (both do the same
thing).

Alternatively, you can set the title instance properties from the axes
instance

ax = fig.add_subplot(111)
ax.title.set_y(1.1)

    Petr> 2) When set_aspect() is used, the size of colorbar does not
    Petr> respect y-dimension of the graph. (See the attached
    Petr> example.) Is it possible to set the size of the colorbar
    Petr> directly?

One of the examples shows how to do this if I recall correctly, but I
don't remember which one.  Eric Firing wrote it so I'm sure he'll be
along shortly to point you to the light.  Eric -- perhaps we should
also add a snippet to the colorbar docstring since this is a common
request.

JDH

Re: [Matplotlib-users] title and colorbar size

[Eric F. <ef...@ha...>]

John Hunter wrote:
>>>>>> "Petr" == Petr Danecek <da...@uc...> writes:
[...]
>     Petr> 2) When set_aspect() is used, the size of colorbar does not
>     Petr> respect y-dimension of the graph. (See the attached
>     Petr> example.) Is it possible to set the size of the colorbar
>     Petr> directly?

Examples of the shrink kwarg are examples/image_masked.py and 
examples/contour_demo.py.

As an alternative to using the shrink kwarg you can always specify axes 
positions manually.  One example is in examples/multi_image.py. 
Attached is another example modified from image_masked.py.

> 
> One of the examples shows how to do this if I recall correctly, but I
> don't remember which one.  Eric Firing wrote it so I'm sure he'll be
> along shortly to point you to the light.  Eric -- perhaps we should
> also add a snippet to the colorbar docstring since this is a common
> request.

I have added a bit to the docstring to emphasize the function of the 
shrink kwarg.  This will usually be the easiest manual solution to the 
problem.  I have also thought a bit about adding functionality to the 
axes.draw() method that would allow the colorbar height to track the 
height of the mappable axes object; maybe I will try it later.

Eric

Re: [Matplotlib-users] title and colorbar size

[Petr D. <da...@uc...>]

Eric, John - thanks for your tips, it works!
petr

On Tue, 2007-01-02 at 21:01, Eric Firing wrote:
> John Hunter wrote:
> Examples of the shrink kwarg are examples/image_masked.py and 
> examples/contour_demo.py.
> 
> As an alternative to using the shrink kwarg you can always specify axes 
> positions manually.  One example is in examples/multi_image.py. 
> Attached is another example modified from image_masked.py.
>
> I have added a bit to the docstring to emphasize the function of the 
> shrink kwarg.  This will usually be the easiest manual solution to the 
> problem.  I have also thought a bit about adding functionality to the 
> axes.draw() method that would allow the colorbar height to track the 
> height of the mappable axes object; maybe I will try it later.
>