I am still not able to plot a function of three vars, one of them
having been fixed. Let us call t the third variable; here are my last
two attempts:
--1:
(C4) ff(x,y,t) := x*t/(y-3);
x t
(D4) ff(x, y, t) := -----
y - 3
(C6) plot3d(ff(x,y,t),[x,2,3],[y,2,4],[nticks,100]);
Error: Expected 3 args but received 2 args
Fast links are on: do (si::use-fast-links nil) for debugging
Error signalled by MACSYMA-TOP-LEVEL.
Broken at LAMBDA. Type :H for Help.
MAXIMA>>
--2:
(C7) plot3d(ff(x,y,t),[x,2,3],[y,2,4],[t,1,1],[nticks,100]);
Error: The ECASE key value |$t| is illegal.
Fast links are on: do (si::use-fast-links nil) for debugging
Error signalled by CATCH.
Broken at MACSYMA-TOP-LEVEL. Type :H for Help.
Is the function definition correct? Should i use ':' rather than ':=' ?
Any suggestion to plot f(x,y)?
A further question: if x and y were functions themselves, say x(z)
and y(z), should i declare such dependence in the f definition:
f(x,y,t) := x(z)*t/(y(z)-3);
Any example about plotting functions and functions of functions will
be appreciated.
thank you
--
Paolo Pumilia