Let me work, figure!

For everyone that needs to plot something in a long loop, and still wants to use the computer in meanwhile, without new figures stealing your keyboard focus and disrupting your work-flow, this file emulates the built-in figure command, but if the desired figure handle already exists, it will just set it as the current figure, without making it visible or on top of other windows.

It's the same as issuing a set(0,'CurrentFigure',h) command, but encapsulated using the same syntax as figure.

Usage:

fig(123);
fig(456, 'Name', 'Figure Title');
h = fig('Name', 'New figure');
fig(h, 'Name', 'New Name');