gobjects function to preallocate arrays for
graphics objects. You can fill in each element in the array with a graphics object handle.
Preallocate a 4-by-1 array:
h = gobjects(4,1);
Assign axes handles to the array elements:
for k=1:4 h(k) = subplot(2,2,k); end
gobjects returns a
GraphicsPlaceholder array. You
can replace these placeholders elements with any type of graphics object. You must use
gobjects to preallocate graphics object arrays to ensure compatibility
among all graphics objects that are assigned to the array.