Plot parametric surface for this function: X=F(phi,beta,rho) Y=F(phi,beta,rho) Z=F(phi,beta,rho) over specific range -pi<phi<pi, -pi<beta<pi, -pi<rho<pi

This is my problem

phi1=-pi/2:0.01*pi:pi/2;
phi2=-pi/2:0.01*pi:pi/2;
phi3=-pi/2:0.01*pi:pi/2;

X=0.4*cos(phi1).*sin(phi3)+0.4*sin(phi1).*cos(phi3).*cos(phi2)+0.35*sin(phi1).*cos(phi2);

Y=0.35*sin(phi2)+0.4*sin(phi2).*cos(phi3);

Z=0.4*cos(phi1).*sin(phi3)-0.4*cos(phi1).*cos(phi2).*cos(phi3)+0.35*cos(phi1).*cos(phi2);

I need

phi1 running from -pi/2 to pi/2 while phi2=const, phi3=const.

Consequentially, phi2 running while phi1=const, phi3=const...

And phi3 running while phi1=const, phi2=const It look like this example

syms s t
r = 2 + sin(7*s + 5*t);

x = r*cos(s)*sin(t);

y = r*sin(s)*sin(t);

z = r*cos(t);

ezsurf(x, y, z, [0, 2*pi, 0, pi])

However, it just support for 2 variables (s, t) only.

I need the function for 3 variables as my problem

Answer 1

[Walter Roberson]

ezplot3()