[Matplotlib-users] trouble removing tick labels

[Slavin, Jonathan]

Hi Eric et al.,

So I have confirmed that the thing that prevents label_outer from working
the way I would expect it to is that after adding a colorbar to the subplot
axes, the attributes colNum and rowNum are set to 0. Would you consider
this a bug? I think I would. I'm thinking that it's because adding the
colorbar creates a new set of axes into which the colorbar is placed. A
minimal example that illustrates the issue is:

fig,axs = plt.subplots(1,2)
img0 = np.random.random((5,5))
img1 = np.random.random((5,5))
cax0 = axs[0].imshow(img0)
fig.colorbar(cax0,ax=axs[0])
cax1 = axs[1].imshow(img1)
print(f'axs[1].column = {axs[1].colNum}') # value is 1
fig.colorbar(cax1,ax=axs[1])
print(f'axs[1].column = {axs[1].colNum}') # values is 0
plt.show()

Jon

On Fri, Mar 20, 2020 at 2:56 PM Slavin, Jonathan <jslavin at cfa.harvard.edu>
wrote:

> Hi Eric,
>
> I think I've isolated the problem. In my figure I have been including
> colorbars for each plot. In my simple example, which I include below,
> label_outer works without the colorbars but not with them.
>
> Regarding using sharey, I am using the same y-axis in each row, but they
> differ between rows. If I use sharey, things get all messed up - the
> smaller images are shrunken and only take up part of the figure. In the end
> I was able to turn off the tick labelling by doing things like:
> for label in ax.get_yticklabels(which='both'):
>             label.set_visible(False)
>
> I think this may have to do with the attributes of axs getting overwritten
> or something. If I print
> axs[1,1].get_subplotspec().colspan.start
> in the case with colorbars I get 0, whereas if I do it without colorbars,
> I get 1 as I should. Same applies to other axes and to rows.
>
> Here's the minimal example:
>
> import numpy as np
> import matplotlib.pyplot as plt
>
> fig,axs = plt.subplots(2,2)
> img0 = np.random.random((10,10))
> img1 = np.random.random((10,10))
> img2 = np.random.random((10,10))
> img3 = np.random.random((10,10))
> cax0 = axs[0,0].imshow(img0,extent=[0.,10.,0.,10.])
> fig.colorbar(cax0,ax=axs[0,0],pad=0.01)
> cax1 = axs[0,1].imshow(img1,extent=[0.,10.,0.,10.])
> fig.colorbar(cax1,ax=axs[0,1],pad=0.01)
> cax2 = axs[1,0].imshow(img2,extent=[0.,10.,0.,10.])
> fig.colorbar(cax2,ax=axs[1,0],pad=0.01)
> cax3 = axs[1,1].imshow(img3,extent=[0.,10.,0.,10.])
> fig.colorbar(cax3,ax=axs[1,1],pad=0.01)
> for ax in axs.flat:
>     ax.label_outer()
> plt.show()
>
> On Fri, Mar 20, 2020 at 11:04 AM <matplotlib-users-request at python.org>
> wrote:
>
>> Date: Thu, 19 Mar 2020 12:42:31 -1000
>> From: Eric Firing <efiring at hawaii.edu>
>> To: matplotlib-users at python.org
>> Subject: Re: [Matplotlib-users] trouble removing tick labels
>> Message-ID: <77e44a65-c519-705e-24ad-dc13f7c204c3 at hawaii.edu>
>> Content-Type: text/plain; charset=utf-8; format=flowed
>>
>> Jon,
>>
>> If you are removing the tick labels it suggests that the y-axes are all
>> matched, in which case using
>>
>> fig, axs = plt.subplots(2, 2, sharey=True)
>>
>> should do what you want.
>>
>> If not, please supply a minimal but complete example illustrating the
>> problem.
>>
>> Eric
>>
>> On 2020/03/19 11:36 AM, Slavin, Jonathan wrote:
>> > Hi,
>> >
>> > I'm making a plot that's a grid of 4 x 4 axes. I'd like to remove the
>> > tick labels for the y axes that are not in the first column. I tried
>> > using what I saw in an example:
>> > for ax in axs.flat:
>> >  ? ? ax.label_outer()
>> > but that seems to have no effect. I found where the code that defines
>> > that function is and tried to use that code directly:
>> > for ax in axs.flat:
>> >  ? ? if ax.colNum != 0:
>> >  ? ? ? ? for label in ax.get_yticklabels(which='both'):
>> >  ? ? ? ? ? ? label.set_visible(False)
>> >  ? ? ? ? ax.get_yaxis().get_offset_text().set_visible(False)
>> >  ? ? ? ? ax.set_ylabel("")
>> > but again no effect. Does anyone have any ideas why these are not
>> > working? Any help would be appreciated.
>> >
>> > Regards,
>> > Jon
>>
> --
> Jonathan D. Slavin
> Astrophysicist - High Energy Astrophysics Division
> Center for Astrophysics | Harvard & Smithsonian
> Office: (617) 496-7981 | Cell: (781) 363-0035
> 60 Garden Street | MS 83 | Cambridge, MA 02138
>
>
>

-- 
Jonathan D. Slavin
Astrophysicist - High Energy Astrophysics Division
Center for Astrophysics | Harvard & Smithsonian
Office: (617) 496-7981 | Cell: (781) 363-0035
60 Garden Street | MS 83 | Cambridge, MA 02138
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