I want to implement this matrix
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0;Ip-l;0.............0
0;0;0;Ip-l;0.......0
.........................
0;0..............0;Ip-l
it is M-Nt x L matrix where M=128
L=65
p=64
1,3,5...columns are zero
2,4,6 columns have Ip-l in consecutive rows
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John D'Errico
am 23 Feb. 2012
So many ways to do this. My favorite to recognize it as a block diagonal matrix.
d = repmat({[0 Ip-1]},1,64);
M = blkdiag(d{:});
If you want your matrix to be sparse (it surely should be, so why not use the capability?)
d = repmat({sparse([0 Ip-1])},1,64);
M = blkdiag(d{:});
I suppose this would work too. Making it sparse is trivial.
M = toeplitz([0, Ip-1,zeros(1,126)]);
M(2:end,:) = [];
Sean de Wolski
am 23 Feb. 2012
look at diag, and eye.
doc diag
doc eye
Please provide an actual matrix we can copy and paste into MATLAB (small example) if you would like more detail.
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