set contour set title "Demo of specifying discrete contour levels - default contours" splot x*y |
#set discrete levels set cntrparam levels discrete 0, 15, 75 set title "3 discrete contours at 0 15 & 75" replot |
#set incremental levels set cntrp level incr -20, 5, 9 set title "9 incremental contours starting at -20, stepping by 5" replot |
#restore defaults set title "" unset contour set cntrparam levels auto 5 |