Surface Plot with 3 vectors

To plot 3 vectors A,B & C, I have used surf plot. I have noticed there is a syntax error in my code below. When I select the columns from the variables and used the plots on the Menu bar...the surface plot popped up but the axis limits are not matching with my data? I appreciate your suggestions.

A=data(1:78,1); B=data(1:78,2); C=data(1:78,3); surf(A,B,C)

Answer 1

[KSSV]

data = importdata('data.txt') ;

x = data(:,1) ; y = data(:,2) ; z = data(:,3) ;

dt = delaunayTriangulation(x,y) ;

tri = dt.ConnectivityList ;
xi = dt.Points(:,1) ; 
yi = dt.Points(:,2) ; 

F = scatteredInterpolant(x,y,z);

zi = F(xi,yi) ;

trisurf(tri,xi,yi,zi) 
view(2)
shading interp

[Bhar_tex]

Thanks for your prompt response.

initially it throws error on your code and I have changed it to x = data.data(:,1) ; y = data.data(:,2) ; z = data.data(:,3) ;

then error on line dt = delaunayTriangulation(x,y) ; as undefined function

I am using Matlab 2012b version with signal & image toolboxes. Not sure if this function shall be used with a specific toolbox installed?

[KSSV]

Read it here: https://in.mathworks.com/help/matlab/math/delaunay-triangulation.html

[Bhar_tex]

Can I get a fit function/equation for this un-well sampled data?

[Giorgo Kapino]

You can perhaps try cftool