When publishing a paper, you need to label your subplots with "a)", "b)", etc in the upper left corner. This routine does it for you with no fuss or muss.
Works great. In the example given, you need to correct the index for the second subplot and the argument for the second plot command.
% >> haxes(1) = subplot(2,1,1);
% >> plot(1:10);
% >> haxes(2) = subplot(2,1,1);
% >> plot(1::2:20);
% >> htext=sublabel(haxes);
Fixed docstring per user review
Inspired: Colour based segmentation