title: changing the color span of a colormap in MATLAB
body: <p>how I change the span of a gray colormap from 0-255 to 100-255 in a mesh/surf graph? I wonder if this can be done without converting the data to uint8.</p>
  
  <p>I have seen <a href="https://stackoverflow.com/questions/3464484/colormap-in-matlab/3466995#3466995">this answer</a> by Jonas </p>
  
  <pre><code>newColormap = imadjust(oldColormap,[low_in; high_in],[low_out; high_out],gamma);
  </code></pre>
  
  <p>but I don't know how to assign the variable "colormap gray" to "oldColormap"</p>
  
  <p>Thanks</p>