help fsurf
FSURF Plot 3-D surface
FSURF(FUN) creates a surface plot of the function FUN(X,Y). FUN is plotted over
the axes size, with a default interval of -5 < X < 5, -5 < Y < 5.
FSURF(FUN,INTERVAL) plots FUN over the specified INTERVAL instead of the
default interval. INTERVAL can be the vector [XMIN,XMAX,YMIN,YMAX] or the
vector [A,B] (to plot over A < X < B, A < Y < B).
FSURF(FUNX,FUNY,FUNZ) plots the parametric surface FUNX(U,V),
FUNY(U,V), and FUNZ(U,V) over the interval -5 < U < 5 and
-5 < V < 5.
FSURF(FUNX,FUNY,FUNZ,[UMIN,UMAX,VMIN,VMAX]) or
FSURF(FUNX,FUNY,FUNZ,[A,B]) uses the specified interval.
FSURF(AX,...) plots into the axes AX instead of the current axes.
H = FSURF(...) returns a handle to the surface object in H.
Examples:
fsurf(@(x,y) x.*exp(-x.^2-y.^2))
fsurf(@(x,y) besselj(1,hypot(x,y)))
fsurf(@(x,y) besselj(1,hypot(x,y)),[-20,20]) % this can take a moment
fsurf(@(x,y) sqrt(1-x.^2-y.^2),[-1.1,1.1])
fsurf(@(x,y) x./y+y./x)
fsurf(@peaks)
f = @(u) 1./(1+u.^2);
fsurf(@(u,v) u, @(u,v) f(u).*sin(v), @(u,v) f(u).*cos(v),[-2 2 -pi pi])
A = 2/3;
B = sqrt(2);
xfcn = @(u,v) A*(cos(u).*cos(2*v) + B*sin(u).*cos(v)).*cos(u) ./ (B - sin(2*u).*sin(3*v));
yfcn = @(u,v) A*(cos(u).*sin(2*v) - B*sin(u).*sin(v)).*cos(u) ./ (B - sin(2*u).*sin(3*v));
zfcn = @(u,v) B*cos(u).^2 ./ (B - sin(2*u).*sin(3*v));
h = fsurf(xfcn,yfcn,zfcn,[0 pi 0 pi]);
If your function has additional parameters, for example k in myfun:
%------------------------------%
function z = myfun(x,y,k1,k2,k3)
z = x.*(y.^k1)./(x.^k2 + y.^k3);
%------------------------------%
then you may use an anonymous function to specify that parameter:
fsurf(@(x,y)myfun(x,y,2,2,4))
See also FPLOT, FPLOT3, FMESH, FIMPLICIT3, SURF, VECTORIZE, FUNCTION_HANDLE.
Documentation for fsurf
doc fsurf
