Joey, Below is a copy of the script in j60232 that produces both lines and symbols on the same plot. It is taken from the demo named Gallery|Curve Fitting. Perhaps type symbol would work more predictably?
y=. 3 2 5 7 6 5 7 4 x=. i.#y dat=. x,:y m=. cubicspline dat x2=. steps 0,(<:#y),50 y2=. m interspline x2 y3=. (3 lsfit dat) p. x2 y4=. (5 lsfit dat) p. x2 pd 'title Spline vs Cubic vs Quintic' pd 'backcolor lightgray' pd 'type symbol' pd x;y pd 'type line' pd x2;y2,y3,:y4 -- (B=) ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
