fcontour2d - level curves of a surface defined by a function on a 2D plot
<opt_args> : This represents a sequence of statements key1=value1, key2=value2 ,... where key1 , key2,... can be one of the following: style, leg, rect, nax, strf or axesflag and frameflag (see plot2d)
Draws level curves of a surface z=f(x,y) . The level curves are drawn on a 2D plot. The surface is given by the external function f . See contour2d .
You can change the format of the floating point number printed on the levels by using xset("fpf",string) where string gives the format in C format syntax (for example string="%.3f" ). Use string="" to switch back to default format and Use string=" " to suppress printing.
Enter the command fcontour2d() to see a demo.
deff('z=surf(x,y)','z=x^4-y^4') x=-3:0.1:3; y=x; fcontour2d(x,y,surf,10);
contour , contour2d , fcontour ,
J.Ph.C.