matplotlib-users Mailing List for matplotlib

This is something that needs to be fixed in the next release.
Meanwhile, try something like,

cax = grid.cbar_axes[0]
cax.axis["right"].toggle(ticks=True, ticklabels=True, label=True)
cax.set_ylabel("Test")

Regards,

-JJ


On Tue, Apr 6, 2010 at 3:26 PM, Angus McMorland <am...@gm...> wrote:
> Hi all,
> I'm trying to use an AxesGrid to plot 5 images and a color bar. I can't work
> out how to get labels on the colorbar, and none of the examples shows this.
> Can anyone help? I presume this is a simple thing, once one knows the
> correct command.
> I'm creating the grid using the following code snippet, taking almost
> verbatim from the examples:
> fig = plt.figure()
> grid = AxesGrid(fig, 111, nrows_ncols = (1, 5), axes_pad = 0.05,
> share_all=True, cbar_mode='single', cbar_location='right', cbar_size='15%')
> for i in xrange(5):
>     im = grid[i].imshow(array[i])
> plt.colorbar(im, cax=grid.cbar_axes[0])
> but then it's not clear how to switch on the labels. Things I've tried:
> normal colorbars come with them on by default. I've also found that
> grid.cbar_axes is a list of five elements, each of which is an CbarAxes, for
> which I can't find documentation on the website, and doing
> grid.cbar_axes[0].set_yticks/set_yticklabels on at least the first and last
> elements of the list doesn't work. Can anyone shed light on this? I bet it's
> easy once I know the magic words.
> Thanks,
> Angus.
> --
> AJC McMorland
> Post-doctoral research fellow
> Neurobiology, University of Pittsburgh
>
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Thanks again to Mike who explained my problems off list.  For other people
trying to do something similar, 
http://docs.python.org/library/stdtypes.html#string-formatting here  is the
page describing python string formats, and the format i was looking for to
show decimals was '%g' (rather than '%d' which was for integers and so
truncated decimals). 

Thanks guys,
Alex


Alex S wrote:
> 
> Ah thank you very much, that works fine except for decimals... (.1, .01,
> .001 etc all show as 0).  Is there a way to show these as well (preferably
> without showing all the rest of the numbers as 1.000, 10.000, 100.000)?  
> Sorry if this is a very newbie question...  I don't know what symbol does
> what on the string formatter, is there a web site somewhere that lays it
> all out?  As per usual, 
> http://matplotlib.sourceforge.net/api/ticker_api.html the manual  has just
> confused me...
> 

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Ah thank you very much, that works fine except for decimals... (.1, .01, .001
etc all show as 0).  Is there a way to show these as well (preferably
without showing all the rest of the numbers as 1.000, 10.000, 100.000)?  
Sorry if this is a very newbie question...  I don't know what symbol does
what on the string formatter, is there a web site somewhere that lays it all
out?  As per usual,  http://matplotlib.sourceforge.net/api/ticker_api.html
the manual  has just confused me...
-- 
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Hi all,

I'm trying to use an AxesGrid to plot 5 images and a color bar. I can't work
out how to get labels on the colorbar, and none of the examples shows this.
Can anyone help? I presume this is a simple thing, once one knows the
correct command.

I'm creating the grid using the following code snippet, taking almost
verbatim from the examples:

fig = plt.figure()
grid = AxesGrid(fig, 111, nrows_ncols = (1, 5), axes_pad = 0.05,
share_all=True, cbar_mode='single', cbar_location='right', cbar_size='15%')
for i in xrange(5):
    im = grid[i].imshow(array[i])
plt.colorbar(im, cax=grid.cbar_axes[0])

but then it's not clear how to switch on the labels. Things I've tried:
normal colorbars come with them on by default. I've also found that
grid.cbar_axes is a list of five elements, each of which is an CbarAxes, for
which I can't find documentation on the website, and doing
grid.cbar_axes[0].set_yticks/set_yticklabels on at least the first and last
elements of the list doesn't work. Can anyone shed light on this? I bet it's
easy once I know the magic words.

Thanks,

Angus.
-- 
AJC McMorland
Post-doctoral research fellow
Neurobiology, University of Pittsburgh

On Tue, Apr 6, 2010 at 1:16 PM, Alex S <sch...@gm...> wrote:
> I've got a program that generates a bunch of plots with logarithmic charts.
> Matplotlib handles them great, but it seems to by default label the y axis
> ticks 10^0, 10^1, 10^2 etc.  Is there an way to make it spell out these
> numbers instead (ie 1, 10, 100 etc)?  I guess I could make custom ticks for
> every one, but the graph is not always the same and if it could do it
> automatically it would be much better.

Make a custom tick formatter:

form = plt.FormatStrFormatter('%d')
plt.gca().yaxis.set_major_formatter(form)


Ryan

-- 
Ryan May
Graduate Research Assistant
School of Meteorology
University of Oklahoma

Hi there,

I've got a program that generates a bunch of plots with logarithmic charts. 
Matplotlib handles them great, but it seems to by default label the y axis
ticks 10^0, 10^1, 10^2 etc.  Is there an way to make it spell out these
numbers instead (ie 1, 10, 100 etc)?  I guess I could make custom ticks for
every one, but the graph is not always the same and if it could do it
automatically it would be much better.

Thanks a lot,
Alex
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On Tue, Apr 6, 2010 at 12:29 PM, Florian Lindner <mai...@xg...>wrote:

> Hello,
>
> my matter is a bit difficult to explain for me, I hope you get the picture.
>
> I want to (line) plot pressure and temperatur at different stations in an
> aircraft engine. The stations are labeled like 0, 1, 2, 22, 23, 3, ...
> (order is like that). Stations are on the y-axis and should be plotted
> equidistant. Two x-axisis are temperatur/pressure.
>
> T
> ^                    x
> |                x
> |            x
> |        x
> |    x
> |x
> o- - - - - - - - - - - -> station
>  0   1   2   22  23  3
>
> (given an linear increase in temperatur)
>
> My plot would be correct with:
>
> plot([1,2,3], [300,350,700]) but the y-axis should have my custom label.
>
> How can I do that?
>
> Thanks,
>
> Florian
>

You can just use custom tick-labels. Here is a simple example:

locs, labels = yticks([1,2,3,4,5,6],['150', '300', '600', '1200', '1800'])
setp(labels, 'rotation', 'horizontal')
yticklabels = getp(gca(), 'yticklabels')

-- 
Gökhan

Hello,

my matter is a bit difficult to explain for me, I hope you get the picture.

I want to (line) plot pressure and temperatur at different stations in an aircraft engine. The stations are labeled like 0, 1, 2, 22, 23, 3, ... (order is like that). Stations are on the y-axis and should be plotted equidistant. Two x-axisis are temperatur/pressure.

T
^                    x
|                x
|            x
|        x
|    x
|x    
o- - - - - - - - - - - -> station
 0   1   2   22  23  3

(given an linear increase in temperatur)

My plot would be correct with:

plot([1,2,3], [300,350,700]) but the y-axis should have my custom label.

How can I do that?

Thanks,

Florian

On 4/5/2010 11:19 PM, Josh Hemann wrote:
> For true sparklines, here is
> http://bitworking.org/news/Sparklines_in_data_URIs_in_Python  another nice
> example in Python .
>    


Thanks!
Alan

AlanIsaac wrote:
> 
> Nice.
> You might want to see 
> http://www.edwardtufte.com/bboard/q-and-a-fetch-msg?msg_id=0001OR
> if you have not already.
> 
> Alan Isaac
> 

Thanks again Alan. I know I am abusing the term "sparkline" because I am not
embedding the visualization within text, but I am not sure what else to call
it. I do think that showing the time series not bound within a set of axes,
without labels, underscores that the time series is a "quick hit", just like
the histograms are. The main focus should be on the scatter plot, with the
marginal visualizations there to aid in quick assessment of distribution and
behavior over time. For true sparklines, here is 
http://bitworking.org/news/Sparklines_in_data_URIs_in_Python another nice
example in Python .

-----
Josh Hemann
Statistical Advisor 
http://www.vni.com/ Visual Numerics 
jhemann at vni dizzot com 

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