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seleting some part of matrix

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Andrea
Andrea 2012-5-30
Q = randi(456,10,15);
row=[1 2 5 4 3 6];
column=[5 7 3 4 8 14];
p = Q(row,column);
P = zeros(size(Q));
P(1:numel(row),1:numel(column)) = p;
The problem is:
I need matrix p to have Q(row(1),column(1)), Q(row(1),column(1)), Q(row(2),column(2)), Q(row(3),column(3)), Q(row(4),column(4)), Q(row(5),column(5)), and Q(row(6),column(6)). But what (p = Q(row,column);) give me is a 6*6 matrix in this way Q(row(1),column(1)), Q(row(1),column(2)), Q(row(1),column(3)), Q(row(1),column(4)), and..... How can solve this problem?
  1 个评论
Andrei Bobrov
Andrei Bobrov 2012-5-31
double
http://www.mathworks.com/matlabcentral/answers/39877-put-smaller-matrix-in-bigger-matrix

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回答（1 个）

Walter Roberson
Walter Roberson 2012-5-31
Q( subs2ind(size(P), row, column) )

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