How to set every Data Cursor in each column in this Figure automatically?

a = 1 : 10
b = 1.001 : 10.001
c = 1.002 : 10.002
a = [a;b;c];
a = a (:)';
cg = clustergram(a, 'Cluster', 'row', 'DisplayRange', ceil(max(abs(a))), 'ColumnPDist', 'chebychev', 'Linkage', 'complete', 'Colormap',colormap('jet'), 'DisplayRatio', 1/9)
plot(cg)

Then, I need click every column and set a Data Cursor. It's too boring,

Is there a way to set every Data Cursor in each column in a Figure automatically, not manually?

Thank you in advance!

Answer 1

[Mario Malic]

Edit: Answer updated (was in comments), this code is tested on R2020b and it works. OP wanted code that works with 2018b, for which this doesn't work.

clear
clc;
close all
a = 1 : 10;
b = 1.001 : 10.001;
c = 1.002 : 10.002;
a = [a;b;c];
a = a (:)';
clustergram(a, 'Cluster', 'row', 'DisplayRange', ceil(max(abs(a))), 'ColumnPDist', 'chebychev', 'Linkage', 'complete', 'Colormap','jet', 'DisplayRatio', 1/9);
cgfig = findall(0,'type','figure', 'Tag', 'Clustergram');
cg_im = findall(cgfig, 'type', 'image');
for ii = 2 : 3 : length(a)
    datatip(cg_im, 'DataIndex', ii);
end

Edited once again according to Adam's suggestion, now it works properly.

Thanks!

[Liu Ananiah]

I want to get color matrix and index by Data Cursor. Could you have any great ideas?

[Mario Malic]

I found it, I don't know why the additional empty figure keeps getting opened on clustergram.

clear
clc;
close all

a = 1 : 10;
b = 1.001 : 10.001;
c = 1.002 : 10.002;
a = [a;b;c];
a = a (:)';
cg = clustergram(a, 'Cluster', 'row', 'DisplayRange', ceil(max(abs(a))), 'ColumnPDist', 'chebychev', 'Linkage', 'complete', 'Colormap',colormap('jet'), 'DisplayRatio', 1/9);
cg_im = findall(0, 'type', 'image'); % Take a look at children/parent properties to see where the things are, as it looks a bit messy to me
for ii = 2 : 3 : length(a)
    datatip(cg_im, 'DataIndex', ii);
end

[Liu Ananiah]

‘I don't know why the additional empty figure keeps getting opened on clustergram.’

So am I.

By using datatip() can achieve it, but it's only supported in r2019b and later. Unfortunately, my version is r2018a.

I will continue to seek the way to solute this problem. I would appreciate it if you could give me a hand. Thank you for your help!

Ananiah

[Mario Malic]

Check here, this might be helpful https://www.mathworks.com/matlabcentral/fileexchange/19877-makedatatip

[Liu Ananiah]

I saw it. It does not work as I wish, maybe the Figure from clustergram is different.

[Mario Malic]

Yes, datatips are different whether you use figure from clustergram or plot. Try it on plot figure.

Edit:

My mistake, try it on clustergram figure.

[Liu Ananiah]

In a way, I need to use clustergram first ;(

[Adam Danz]

+1 Great find applying the datatip to the image object.

Just in case more than 1 image object exists you can get the clustergram figure handle and then the image handle.

cgfig = findall(0,'type','figure', 'Tag', 'Clustergram');
cg_im = findall(cgfig, 'type', 'image');

"I don't know why the additional empty figure keeps getting opened on clustergram"

The colormap is being set by calling the colormap function,

cg = clustergram(. . ., 'Colormap', colormap('jet'), . . .)

When the fig or axis handle is not provided in colormap(__) it uses gcf. However, figure's HandleVisibility in the clustergram is set to 'off' by default. Since gcf() doesn't have access to an existing figure handle, it creates one.

To avoid this, set the colormap as,

cg = clustergram(. . ., 'Colormap', 'jet', . . .)

or

cg = clustergram(. . ., 'Colormap', jet(n), . . .)

[Adam Danz]

For anyone looking for a solution where datatip is not supported (prior to r2019b), see Method 5 in this answer.