xclear — clears a graphics window
xclear([window-id])
Without any argument, this function clears the current graphic figure by turning its visibility to 'off'.
Otherwise it clears the graphics figures whose numbers are included
in the vector window-id. For example xclear(1:3) clears windows
1, 2 and 3.
If one of the windows does not
exist, then it is automatically created.
Function xclear is obsolete.
To clear a figure, please use instead the clf function or the visible property.