selecting specific rows from a matrix corresponding to the columns of other matrix

Hello,

I have matrix A(40x2) and a big Matrix B (25000x9). suppose my matrix A is like

250 300

356 407

433 489 and so on..I need to select rows corresponding to these columns (i.e. 250 to 300, again 356 to 407) from matrix B and put it to matrix C.

Can anyone please suggest me how to do that? Thanks in advance.

Answer 1

[KSSV]

Let A abd B be your matrices of size 40*2 and 25000*9.

[m,n] = size(A) ; 
C = cell(m,1) ; 
for i = 1:m
    C{i} = B(A(i,1):A(i,2),:) ; 
end
C = cell2mat(C) ; 

[SBS]

Thank you so much. It helped a lot and worked perfectly.