Data dimensions must agree error

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Ben Baker
Ben Baker 2017-12-5
回答： KSSV 2017-12-5
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')
  2 个评论
KSSV
KSSV 2017-12-5
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
Ben Baker 2017-12-5
编辑：Ben Baker 2017-12-5
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

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回答（1 个）

KSSV
KSSV 2017-12-5
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.

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