Get corresponding value of a 3D matrix using an index vector

Hello,I have a 3D matrix, dimesion 37*30*1000. And an index vector i, dimension 37*1, containing the index of the column I want to get the value for each row from 1--> 37

Could anyone tell me how to get the 37*1*1000 new matrix from the original matrix and the index vector?

Thank you,

[Stephen23]

Question is continued here:

https://www.mathworks.com/matlabcentral/answers/425750-sub2ind-get-values-of-3d-matrix-using-an-index-vector

Answer 1

[KSSV]

A = rand(37,30,100) ;
C = 3 ;  % say you need third columns from each 
iwant = zeros(37,1,100) ;
for i = 1:100
    iwant(:,1,i) = A(:,C,i) ;
end

[heidi pham]

Hello, thanks for your answer. but is there any other way not using loop, since one of my dimession is 100000 actually. I guess sub2ind should work, but I dont know how to adapt it in my case.