Edit colorbar of heatmap (string)

Question

Gerrit Liedtke 2019-6-26

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/469003-edit-colorbar-of-heatmap-string

回答： Tony Castillo 2023-12-19

Hi,

Is it possible to edit the colorbar of a heatmap such that it looks like the following image (rapidly created with paint ;) )

So the values aren't numeric but strings.

Thanks for help!

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Adam Danz 2019-6-26

编辑：Adam Danz 2019-6-28

The handle to the colorbar in heatmap is inaccessible. Without the handle, you can't change properties to the colorbar; you can't even delete it. Even when you try to add a new colorbar, you cannot output the handle with a heatmap plot.

heatmap() in general is highly restrictive in the user's abilty to manipulate many of its properties. I used to use heatmap more frequently prior to these changes and have moved onto using imagesc() instead. Bummer.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Adam Danz 2019-6-26

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/469003-edit-colorbar-of-heatmap-string#answer_380977

编辑：Adam Danz 2019-6-27

在 MATLAB Online 中打开

This can't be done with heatmap() (see comments under the question).

If you're using a different function that allows access to the colobar, it's fairly straightforward. Here's a demo.

% Create demo
C = rand(3,4)/10; 
imagesc(C)
cbh = colorbar(); 
% set color range
caxis([0,.1])
% set ticks 
set(cbh, 'YTick', [0.001, 0.01, 0.05, .1], ...
    'YTickLabel', {'p=0.001', 'p=0.01', 'p=0.05', 'p=.1'})

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

Answer 2

Christian Karcher 2020-4-28

10
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/469003-edit-colorbar-of-heatmap-string#answer_428822

编辑：Christian Karcher 2020-4-28

在 MATLAB Online 中打开

The handle to the colorbar is accessible, and with it all modifications:

figure; 
heatmap(rand(5))
axs = struct(gca); %ignore warning that this should be avoided
cb = axs.Colorbar;
cb.TickLabels = {'p<0.1','p>0.1','...'};

7 个评论
显示 5更早的评论隐藏 5更早的评论

Alexander Krauss 2022-9-29

编辑：Alexander Krauss 2022-9-29

Great solution, thanks a lot (also for the rapid reply) ! :)

Best regards,

Alex

Muhanned Alsaif 2023-8-21

编辑：Muhanned Alsaif 2023-8-21

another way to access the colorbar can be found in the following post:

https://www.mathworks.com/matlabcentral/answers/654008-axis-ticks-and-colorbar-labels-in-bold-heatmap

请先登录，再进行评论。

Answer 3

Tony Castillo 2023-12-19

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/469003-edit-colorbar-of-heatmap-string#answer_1373947

Is it possible to add a label to that colour bar which is directly created in a heatmap? I mean we can tag a SURF plot (the colourbar because it is separated from the surfplot), but I have not found the manner of doing the same in the colorbar of the heatmap.