title: Re-scaling X axis in imagesc plot in Matlab
body: <p>I have written the following code in Matlab to show different shades of color red. How can I re-scale all x-axis in sub-plots to 0-1?</p>
  
  <pre><code>% create a custome color map
  map = zeros(11,3);
  reds = 0:0.1:1;
  map(:,1) = reds(:);
  colormap(map);
  
  figure(1)
  
  depth = [1 2 3 4];
  num_depth = length(depth);
  
  for index = 1: num_depth    
      subplot(num_depth,1,index);
      step = 1/(2^depth(index)-1);
      A = 0:step:1;
      imagesc(A);
      axis equal
      set(gca,'ytick',[])
  end
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/PP0Oa.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PP0Oa.png" alt="enter image description here"></a></p>