Replace multiple rows by an array

Hi,

I need to replace multiple rows of a matrix by one array. For example,

c=[1 3 5 2 0]
   5 2 9 1 4
   2 1 0 6 7
   1 2 3 4 5]

index=[0
       1
       0
       1];

Q=[9 8 6 2 1]

Output should look this this:

    c=[1 3 5 2 0]
       9 8 6 2 1
       2 1 0 6 7
       9 8 6 2 1]

Any help is appreciated. Thanks in advance.

Answer 1

[Azzi Abdelmalek]

c(logical(index),:)=repmat(Q,sum(index),1)

[Damith]

Thanks.

[nvmnghia]

Does repmat actually repeat Q sum(index) times in this case?