Matlab coloured checkerboard

Question

I'm using the Matlab checkerboard function to create a checkerboard. I'm interested in having the checkerboard as stripes (rather than checks) which I have figured out. I also want to change the colour of the stripes so that it's red and white or red and pink rather than black and white. I don't understand how to do this.

In the Matlab checkerboard function, black is defined as zeros(n) where n is the size and because the colour code for black in Matlab is [0 0 0], this works. But I don't get how to set this for it to produce red coloured tiles or stripes.

I have tried

   red = repmat([1 0 0], 81,27)

to get red stripes for a checkerboard that I want with 81 squares. This produces an 81 x 81 matrix that looks like:

  1 0 0 1 0 0 1 0 0 .... 1 0 0 
  1 0 0 1 0 0 1 0 0 .... 1 0 0 
  1 0 0 1 0 0 1 0 0 .... 1 0 0 
  .
  .
  .
  1 0 0 1 0 0 1 0 0 .... 1 0 0

And it isn't red, it's just black and white stripes of varying thickness.

Can anyone help?!

You can use `imagesc` for plotting and change the `colormap` — kedarps, Jul 18 '17 at 00:56

score 0 · Accepted Answer · answered Jul 18 '17 at 01:05

0

Use imagesc to plot, and colormap to change colors,

red = repmat([1 0 0], 81, 27);
cmap(1,:) = [1 0 0];
cmap(2,:) = [0 0 0];
imagesc(red);
colormap(cmap);

This should give you,

answered Jul 18 '17 at 01:05

kedarps

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Matlab coloured checkerboard

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