Data dimensions must agree error

Hi, I am trying to plot a 3D surface from 4 column data (x,y,z,data). When i run the code to plot the surface using

"surf(x,y,Data')" i got the error "Data dimensions must agree." anyone please help. Thanks. Here is the code :

Axstep=2.5; 

Axlines=6000; %number of lines in axial direction

Path = 'C:\Users\asay0001\Google Drive

Data = zeros(480,Axlines);

for i = 1:Axlines

DataTemp = importdata([Path '\DATA (' num2str(i) ').txt']);

Data(:,i) = DataTemp(:,4);

end

Steps = DataTemp(:,1);

Axsteps=[1:Axlines]*Axstep;

figure; plot(Steps,Data(:,[1:Axlines])); grid on;

%need the lateral step size

Latstep=Steps(2)-Steps(1);

[x y] = meshgrid([-99.99:2.5:-497.50],[-400:2.5:97.49]);

surf(x,y,Data')

[KSSV]

What is size of x,y and Data? They should be matrices of same dimensions......we don't have data in hand to check.

[Ben Baker]

Axlines=6000, which are number of txt file. in every text file there are 4 columns of x,y,z,data (480(rows) X 4 (column)). Here is below 1 row of one file data out of 6000 files.

x y z data

-99.997000 -400.004000 -2999.998000 0.002255

Answer 1

[KSSV]

That case you have to foolow delaunayTriangulation. Read about it. Check the below code.

N = 100 ;  
x = rand(N,1) ;
y = rand(N,1) ;
z = rand(N,1) ;
data = rand(N,1) ;  
dt = delaunayTriangulation(x,y,z) ;
tri = dt.ConnectivityList ;
trisurf(tri,x,y,z,data) ;

In the above... x , y, z and data are your column matrices read from the text file.