Not able to add 2d array to 3d array
2 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
I'm trying to add the 2d array cycle to a 3d array cycle_mat. i is a variable that changes after each loop iteration. I'm getting the following error:
Subscripted assignment dimension mismatch.
Error in The_Code (line 622) cycle_mat(:,:,i)=cycle;
if true
cycle_mat=zeros(50000,4,100);
loop starts
cycle_mat(:,:,i)=cycle;
loop ends
end
5 Kommentare
Ameer Hamza
am 27 Jun. 2018
MATLAB does not do such thing even for a 2D matrix.
A = [1 2 3; 4 5 6; 7 8 9];
is a 3x3 matrix. Now if I try
A(2, :) = [1 2];
it will again throw an error.
The dimension of left and right side of an assignment must be same. Also In a MATLAB matrix, the length of all rows must be same. Similarly for columns and pages. If your matrix size is continually changing along the third dimension then consider using cell arrays.
Antworten (1)
Ameer Hamza
am 27 Jun. 2018
The error is probably caused because the dimension of cycle are not [50000 x 4]. Also, if cycle is has a constant value then you don't need to use for loop to assign to 3rd dimension of a matrix. MATLAB support auto array expansion feature. So for R201bb and later, the following will work
cycle_mat(:,:,i_vector) = cycle_mat(:,:,i_vector) + cycle;
i_vector is a vector of all indexes to which you want to add cycle.
For R2016a and earlier
cycle_mat(:,:,i_vector) = bsxfun(@plus, cycle_mat(:,:,i_vector), cycle);
Siehe auch
Kategorien
Mehr zu Matrix Indexing finden Sie in Help Center und File Exchange
Produkte
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!