plotting a function of three variables



>>>>> "Paolo" == Maths Mathematica Geometry Crew <mathematica@linfe.it> writes:

    Paolo> I am still not able to plot a function of three vars, one of them
    Paolo> having been fixed. Let us call t the third variable; here are my last 
    Paolo> two attempts:


    Paolo> --1:

    Paolo>   (C4)  ff(x,y,t) := x*t/(y-3);

    Paolo> 					       x t
    Paolo>   (D4)                         ff(x, y, t) := -----
    Paolo> 					      y - 3

    Paolo>   (C6)   plot3d(ff(x,y,t),[x,2,3],[y,2,4],[nticks,100]);

    Paolo>   Error: Expected 3 args but received 2 args

>From the error message, we want 2 args.  So the following will produce
a plot:

fff(x,y) := f(x,y,1.3);
plot3d(fff(x,y),[x,2,3],[y,2,4],[nticks,100]);

    Paolo> Any example about plotting functions and functions of functions will
    Paolo> be appreciated.

? plot;
? plot3d;

will give some examples.

Ray