How to use cell indexes into a matrix?

Hi everyone

I have indices as cells such as A{:,:}= {A1=1x212 double, A2= 1x218 double, A3= 1x216 double, A4=1x218 double};

and a Matrix B (j,t) where rows j=j1, j2, j3, j4 and columns t has to vary in function of rows of each elements of A;

I would like to have a cell array C that is a result from the combination of each row of B and each element of indexes A such as

C={B(j1,A1); B(j2,A2); B(j3,A3); B(j4,A4)}

Would anyone help me to fix that issue? Thank you.

Best

[Stephen23]

Duplicate: https://www.mathworks.com/matlabcentral/answers/1780720-how-to-use-cell-indexes-into-a-matrix