The Krouchev Journal-Figure Advanced MATLAB Toolkit

Provides (for now) 2 utilities that address user needs (see comments to the acknowledged submissions

below):
% lafig3: Combines existing (sub)figures into a new figure.
% zbkfig1: Scales down or up a whole figure to better fit the page of the (save as) .pdf

See the demo3 & utilities help, as well as browse boldly inside their MATLAB code

Note:

Although the code is made as user-friendly & as much annotated as is reasonable,
it is meant for peer MATLAB users i.e. for a somewhat advanced community, that would use the code toward, say, journal-article or internal-report preparation.

Whoever finds this insufficient is kindly invited to proceed better in his/her own doing.