h = gca
h = gcareturns the handle to the current axes. The current axes is the axes to which graphics commands such as
surfplot their results.
Each figure has its own current axes. Changing the current figure causes
gca to return the correct axes handle for the newly current figure.
Use the command
subplot to change the current axes to a different axes, or to create new ones. Use
cla to reset the current axes.
(c) Copyright 1994 by The MathWorks, Inc.