How to concatenate multi rows in matrix ?
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How to concatenate multi rows in matrix, for example I've a matrix 6X8
x= 1 1 1 1 1 1 1 1
2 2 2 2 2 2 2 2
3 3 3 3 3 3 3 3
4 4 4 4 4 4 4 4
5 5 5 5 5 5 5 5
6 6 6 6 6 6 6 6
the result like this
y = 1 1 1 1 1 1 1 1
2 2 2 2 2 2 2 2
3 3 3 3 3 3 3 3
4 4 4 4 4 4 4 4
y = 1 1 1 1 1 1 1 1
2 2 2 2 2 2 2 2
5 5 5 5 5 5 5 5
6 6 6 6 6 6 6 6
y = 3 3 3 3 3 3 3 3
4 4 4 4 4 4 4 4
5 5 5 5 5 5 5 5
6 6 6 6 6 6 6 6
tried concatenated row_row by this code below :
old=round(10*rand(6,8))
for n=1 :size(old)
for m=n+1:size(old)
newline = [old(n, :); old(m, :)]
end
end
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Answers (1)
Andrei Bobrov
on 28 Nov 2013
Edited: Andrei Bobrov
on 28 Nov 2013
y = 1:6;
o = reshape(bsxfun(@times,kron(fliplr(~eye(3)),[1 1]),y)',1,[]);
out = repmat(reshape(o(o~=0),4,1,[]),1,7);
ADD
old = randi(40,6,8)
t = kron(fliplr(~eye(3)),[1 1])'>0
for jj = size(t,2):-1:1
out(:,:,jj) = old(t(:,jj),:);
end
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