create a matrix with existing matrix

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Elysi Cochin
Elysi Cochin 2013-12-3
编辑： Andrei Bobrov 2013-12-3
i have a matrix with dimension
A = M * 361
i wanted to create a matrix with size
B = M * 3600
with this matrix A
how to do it??
also a matrix with dimension
C = N * 900
i wanted to create a matrix with size
D = N * 3600
how to do it?? please do reply...
with this matrix A
  4 个评论
显示 2更早的评论
ES
ES 2013-12-3
C to D is straightforward since number of rows in C and D are equal, and D has 4 times the columns in C.
D=repmat(C,1,4)
ES
ES 2013-12-3
编辑：ES 2013-12-3
and for A to B you can use this workaround.
B=repmat(A,1,10)
B=B(:,1:3600);
I hope someone gives a straighter solution.

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采纳的回答

ES
ES 2013-12-3
编辑：ES 2013-12-3
C and D have same number of rows. Similarly A and B have same number of rows. So C to D is straightforward since number of rows in C and D are equal, and D has 4 times the columns in C.
D=repmat(C,1,4)
and for A to B you can use this workaround.
B=repmat(A,1,10)
B=B(:,1:3600);
I hope someone gives a straighter solution.

更多回答（1 个）

Andrei Bobrov
Andrei Bobrov 2013-12-3
编辑：Andrei Bobrov 2013-12-3
One way:
newsize2 = 3600;
[i0,j0] = ndgrid(1:size(A,1),1:size(A,2));
F = griddedInterpolant(i0,j0);
[io,jo] = ndgrid(i0(:,1),linspace(1,j0(end),newsize2));
B = F(io,jo);
or
B = zeros(M,3600);
B = A(:,rem((1:size(B,2))-1,size(A,2))+1);

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