Set xaxis of imagesc with scaled values

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Ahmet Hakan UYANIK 2022-5-4

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编辑： Adam Danz 2022-5-4

采纳的回答： Adam Danz

Hi everybody,

I have a matrix(20x400) and I am plotting it with imagesc where y axis having 20 values and xaxis having 400 values.

However, I would like to know how can I scale this xaxis 400 to intervals like between 0:20 = 1, 20:40 = 2 until 380:400 = 20; and setting x axis of imagesc in 0-20 scale with the values of 0-20.

I hope it is clear what I am intended to do.

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DGM 2022-5-4

Are you just wanting to set the spacing for the ticks, or are you actually wanting a nonuniform spatial scaling?

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采纳的回答

Adam Danz 2022-5-4

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https://ww2.mathworks.cn/matlabcentral/answers/1711510-set-xaxis-of-imagesc-with-scaled-values#answer_956965

编辑：Adam Danz 2022-5-4

在 MATLAB Online 中打开

Specify x and y values using imagesc(x,y,C)

I think this is what you're looking for

C = rand(20,400); % Replace this with your matrix

x = linspace(1,height(C),width(C));

y = 1:height(C);

imagesc(x,y,C)

axis equal % optional

axis tight % optional

Alternatively, use imresize

figure

I = imresize(C,[20,20]);

imagesc(I)

axis equal

axis tight

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Ahmet Hakan UYANIK 2022-5-4

Excellent, thanks!

Adam Danz 2022-5-4

Glad it worked out. I'll add the imresize suggestion to the main answer for better visibility.

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