MATLAB by rudra pratap

204 Graphics
% SURFINTERP : script file to generate an interpolated surface
% Given vectors x, y, and z, generate data matrix Zi from
% interpolat ion to fit a surface through the data
% -----------------------------------------------------------
XV 2*rand(1, 100)-1;
yv 2*rand(1, 100)-1;
zv 3./(1 + xv .-2 + yv .-2) ;
scatter3(xv,yv,zv)
%
%
%
%
this is the given x
this is the given y
this is the given z
show data as stem plot
xi linspace (-1,1,30) ;
yi xi';
%
%
%
create uniformly spaced xi
create uniformly spaced yi
note that yi is a column
[Xi , Yi , Zi] griddata(xv,yv,zv,xi,yi,'v4');
% interpolate surface using
% v4 (MATLAB 4 griddata) method
surf (Xi ,Yi,Zi)
% plot the interpolated surface
The interpolated surface is shown in Fig. 6.11.
3
2.5
2
1.5
0.5
1
·1 ·1
Figure 6.11: The interpolated surface.