tight_subplot(Nh, Nw, gap, marg_h, marg_w)

Fills the figure with axes subplots with easily adjustable margins and gaps between the axes.

Subplot tends to leave a lot of empty space around the axes. Tight_subplot allows to adjust the spacing between the axes as well as the margins around the axes.
For example:
[ha, pos] = tight_subplot(3,2,[.01 .03],[.1 .01],[.01 .01])
for ii = 1:6; axes(ha(ii)); plot(randn(10,ii)); end
set(ha(1:4),'XTickLabel',''); set(ha,'YTickLabel','')