How to plot square diagram

Dear member, how to plot this figure in Matlab. Many thanks

Kind regards

Answer 1

[Adam Danz]

Use heamap().

Demo:

data = diag(randi(20,1,20)+40);
heatmap(data)
xlabel('predicted')
ylabel('actual')

%Create colormap that looks like the image in the question
cm = [linspace(1,0,100)', linspace(1,0,100)', linspace(.875,1,100)']; %from [1 1 .875] to [0 0 1]
colormap(cm)
% or just use
% colormap(flipud(colormap('parula')))

[Tran Hoa]

Thank you so much Adam

Kind regards

[Adam Danz]

Glad I could help. I just updated the answer to include a colormap that approximates the colormapping in the image in your question.

Answer 2

[Tran Hoa]

Dear Adam how to change number 1, 2 (I circur in the figure by name EX: Machine 1). Here my code and file exel

filename = 'Test output ANN alone _ PSO _ IPSO';

sheetname1 = 'Sheet1';

data = xlsread(filename,sheetname1,'B2:D42');

heatmap(data)

xlabel('predicted')

ylabel('actual')

Thank you

[Adam Danz]

To change the xtick labels in the demo from my answer,

h = heatmap(data); 
labels = sprintfc('%c','a':'t'); 
h.XData = labels;  % <---change labels

[Adam Danz]

Tran Hoa's answer moved here as a comment. Please use the comment sections for discussion and the answer sescions for answer.

Why errors happen when I use this code as your instruction

data = diag(randi(20,1,20)+40);

heatmap(data)

xlabel('predicted')

ylabel('actual')

%Create colormap that looks like the image in the question

cm = [linspace(1,0,100)', linspace(1,0,100)', linspace(.875,1,100)']; %from [1 1 .875] to [0 0 1]

colormap(cm)

h = heatmap(data);

labels = sprintfc('%c','a':'t');

h.XData = labels; % <---change labels

[Adam Danz]

How could I answer that without knowing the error message? Please provide the entire copy-pasted error message and the version of matlab you're using.

[Tran Hoa]

I used Matlab 2018B. Thank you

[Tran Hoa]

Dear Adam, based on your instruction, I also solved this problem. Thank you so much. Kind regards

[Adam Danz]

I see. sprintfc() is an undocumented built-in matlab function. Apparently you have another file with the same name and that file is a script.

That line is just creating fake labels, anyway. You probably already have your own labels. In any case, you can replace that line with this.

labels = strsplit(sprintf('%c ','a':'t')); 
labels(end) = []

Answer 3

[Tran Hoa]

Thank you so much Adam. I’m a beginer, I will try to study more. Kind regards

[Tran Hoa]

Dear Adam, how to plot figure like this, two values (347 and 14.6% or can use words insteads of number in the sheet). Thank you so much.

[Adam Danz]

@ Tran Hoa, this thread may become a bit difficult to follow when there are several "answers" posted that are not answer, but discussion. Please use the "comment" section under a particular answer or under the question if you'd like to continue discussion. The "answer" section is for proposing answer to the question stated at the top of the page.

You can't edit the text displayed in a heatmap. Here's a link to some alternatives:

https://www.mathworks.com/matlabcentral/answers/418336-how-to-show-values-on-heatmap-belonging-to-a-different-dataset