MATLAB: When I use the command ‘pcolor’ on a large matrix I get a blank plot – does anyone know why

Question

When I use the command 'pcolor' on a large matrix I get a blank plot – does anyone know why?

I want to use 'pcolor' to plot a matrix of 6144 by 150 – if I just generate a matrix of this size using a random generator e.g.: X=rand(6144,150)

and then plot: pcolor(X)

I get a blank screen but pcolor works fine for e.g.: X=rand(25,10)

Please help. Thanks

Answer 1

Is it blank, or is it black?

h = pcolor(X);
set(h, 'EdgeColor', 'none')