Setting your own threshold for a heatmap

I am trying to create a heat map for my data and I was wondering how I can change the thresholds so that I can input values that will effect the colours displayed in the columns and rows. I don't necessarily wish to use the mean of my row or column. So for example I may want to use a random value and threshold using this?

[Daniel kiracofe]

 Not really sure what you are asking here... by heatmap do you mean you are using pcolor() to plot your data?  If so, caxis() will change the scale of the color bar.  if that's not what you are getting at, maybe post a little more about what you are doing...

Answer 1

[Image Analyst]

You can use colormap() to apply a custom colormap. Use caxis to specify what values apply to the first and last values in your data range. Use colorbar() to display a color bar legend.