Thread Subject:

Error using ==> griddata3 at 51..................... METHOD must be

hello
good day to you all

please could someone please guide me on how to solve this error. thanks so much for the time.

Below is the code. I really want to plot a function with 4 variables.


X = gallery('uniformdata',[5000 1],0)-1;
A = gallery('uniformdata',[5000 1],1)-1;
B = gallery('uniformdata',[5000 1],2)-1;
C = gallery('uniformdata',[5000 1],3)-1;

F= 1.10471*(X.^2).*A + 0.04811*B.*C.*14.0 + A ;


%%Define a regular grid, and grid the data to it:
d = -0.8:0.05:0.8;
%[xi,yi,zi] = meshgrid(d,d,d);
[Xi,Ai,Bi,Ci] = ndgrid(d,d,d,d);

w = griddata3(X,A,B,C,F,Xi,Ai,Bi,Ci);
%[X,A] = ndgrid(-2:.2:2, -2:.2:2);
%[X,A,B,C] = ndgrid( -2:.2:2, -2:.2:2);



% Since it is difficult to visualize 4-D data sets,
% use isosurface at 0.8:

p = patch(isosurface(Xi,Ai,Bi,Ci,w,0.8));
isonormals(Xi,Ai,Bi,Ci,w,p);
set(p,'FaceColor','blue','EdgeColor','none');
view(3), axis equal, axis off camlight, lighting phong


%F= 1.10471*X^2*A +0.04811*B*C*(14.0 + A);
%% F= X.^2*A + B.*C.*(14 + A);
%% mesh(F)
mesh(F)



...............

?? Error using ==> griddata3 at 51
METHOD must be one of 'linear', or 'nearest'.

Error in ==> testndgrid3 at 14
w = griddata3(X,A,B,C,F,Xi,Ai,Bi,Ci);

"Mark L. J." <abejohno@gmail.com> wrote in message <6002b0cd-7374-4249-93be-aa8bd880eb04@googlegroups.com>...
> ?? Error using ==> griddata3 at 51
> METHOD must be one of 'linear', or 'nearest'.
> Error in ==> testndgrid3 at 14
> w = griddata3(X,A,B,C,F,Xi,Ai,Bi,Ci);
- - - - - - - - - - -
  Read your error message very carefully; then consult the documentation for 'griddata3'.

Roger Stafford