select 2 rows in a (n,m) matrix

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jaah navi
jaah navi 2018-1-4
评论： Rik 2018-1-5
what command can be used to select 2 rows in a matrix(10,10),3 rows in a matrix(10,10),4 rows in a matrix (10,10)

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回答（2 个）

KL
KL 2018-1-4
编辑：KL 2018-1-4
I suppose you want to randomly sample 1,2 or 3 rows from your matrix.
A = rand(10); % example
noRows = 1;
A_sample = A(randperm(size(A,1),noRows),:);
Torsten
Torsten 2018-1-4
rowi = A(i,:);
selects the i'th row from the matrix A.
Does this help ?
Best wishes
Torsten.
  1 个评论
Rik
Rik 2018-1-5
This is the solution they should be looking for. And knowing that i can be a vector.

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