Replace multiple rows by an array

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Damith 2016-6-15

评论： nvmnghia 2020-5-3

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.

Azzi Abdelmalek 2016-6-15

编辑：Azzi Abdelmalek 2016-6-15

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

Damith 2016-6-15

Thanks.

nvmnghia 2020-5-3

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

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