How to display matrix as an image ?

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Suresh Dahal
Suresh Dahal 2017-8-22
编辑： Adam 2017-8-22
I have a diagonal matrix A of 4x4 and I want to display this as an image, how am I supposed to do that? I tried using imshow(A) and it does not work, please help.
  2 个评论
Baptiste Ottino
Baptiste Ottino 2017-8-22
Could you be more precise please? What type is your matrix? What error does imshow return? imshow should be the right function here, so the problem is elsewhere.

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回答（1 个）

Reen
Reen 2017-8-22
Try using:
image(A)
That will display the image like a heatmap with each entry being a square. If you want to specify the color of each square, you'll have to use a 3 dimensional array. For example if you use something like:
A(:,:,1) = [255 0 255 0; 0 255 0 255; 255 0 255 0; 0 255 0 255];
A(:,:,2) = [255 0 255 0; 0 255 0 255; 255 0 255 0; 0 255 0 255];
A(:,:,3) = [255 0 255 0; 0 255 0 255; 255 0 255 0; 0 255 0 255];
% A(1,1,:) is the rgb color vector, so white for A(1,1,:) = [255 255 255] and black for A(1,2,:) = [0 0 0]
image(A)
you'll get something that looks like a checkerboard.

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