Dot indexing is not supported for variables of this type Error

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Chris Dan
Chris Dan 2020-1-18
评论： Voss 2022-11-17
Hello,
I am trying to run this loop in a function
for i = 1:1:size(GlobalMeshonBody_1,1)
nE =size(GlobalMeshonBody_1(i).IndividualStiffnessMatrix,2);
end
and I am getting this error:
"Dot indexing is not supported for variables of this type."
But if I run the above loop in the main script, I get no errors at all...
The answer is get is
nE = 7;
Does anyone know?
  2 个评论
Walter Roberson
Walter Roberson 2020-1-18
Time to use the debugger
dbstop if error
then run the code. When it stops due to the error, examine class(GlobalMeshonBody_1)
Chris Dan
Chris Dan 2020-1-19
I dont understand what you are trying to say...
pic4.JPG
Thsi is my struct it should run, but it isnt....

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回答（1 个）

Harsha Priya Daggubati
As mentioned in the comments, Can you put a breakpoint for the line where the error is being thrown.
Refer to this link and check if this helps:
https://www.mathworks.com/matlabcentral/answers/423321-error-dot-indexing-is-not-supported-for-variables-of-this-type-when-initializing-an-array
  2 个评论
Voss
Voss 2022-11-17
Since BW_mat comes from readmatrix(), BW_mat is a matrix. Therefore, try replacing "BW_mat.obj_matrix" with "BW_mat".
That is to say:
BW_mat = readmatrix('GestureU_Kalman.txt');
for jj = 1:size(BW_mat,3)
BW = BW_mat(:,:,jj);
s = regionprops(BW, 'centroids');
% etc.

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