xtape - set up the record process of graphics
xtape is used to set up the record process of graphics:
xtape("on") just selects the driver "Rec" which records all the graphics operations.
xtape("clear",num) clears the graphics window num and clears the recorded graphics associated with window num .
xtape("replay",num) redisplays all the recorded graphics in the window num .
xtape("replaysc",num,rect) replots the graphics window num using rect=[xmin,ymin,xmax,ymax] as x and y bounds.
driver , replot , xbasc , xbasr ,
J.Ph.C.