What is wrong with the following code using ezplot?

syms u v

x= u^2+sin(v);

y= tan(v);

z= 1/(tan(u)+sin(v));

ezplot(@(u,v)tan(x)+y+sin(z)==0)

% I want a 2D plot of u and v from the parametrized equation.

Answer 1

[Star Strider]

You have a two-variable equation. The ezplot and fplot functions plot one-variable equations. You have to change your function definitions and your function call in the ezcoutour or fcontour (or other mesh or surface plot):

syms u v

x = symfun(u^2+sin(v), [u,v]);

y = symfun(tan(v), v);

z = symfun(1/(tan(u)+sin(v)), [u,v]);

fcontour(@(u,v)tan(x(u,v))+y(v)+sin(z(u,v)))

This code works (and will work with ezcontour or fcontour with R2012a and later). However, the fcontour (and ezcontour) call throws this error:

Warning: Error updating FunctionContour.

   Division by zero.

and produces no plot. I will let your sort that out.