Create a matrix of this type?
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Hello,
I want to make a matrix this type
1 0 0 0 0 0
2 0 0 0 0 0
3 4 0 0 0 0
5 6 0 0 0 0
7 8 9 0 0 0
10 11 12 0 0 0
13 14 15 16 0 0
17 18 19 20 0 0
% Alternate rows have same number of element
%Each element of the matrix is 1 larger than previous one
How to achieve it ?
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Accepted Answer
Andrei Bobrov
on 20 Jan 2019
m = 8;
n = 6;
P = kron(triu(ones(n,m/2)),[1,1]);
P(P>0) = 1:nnz(P);
out = P';
3 Comments
Andrei Bobrov
on 21 Jan 2019
Edited: Andrei Bobrov
on 21 Jan 2019
m = 6;
n = 6;
lo = triu(~rem((1:n)' + (1:m),2));
out = int64(lo);
out(lo) = 1:nnz(lo);
out = out';
with kron
m = 6;
n = 6;
out = triu(kron(ones(ceil(n/2),ceil(m/2)),[1,0;0,1]));
out = out(1:n,1:m);
out(out~=0) = 1:nnz(out);
out = out';
More Answers (1)
madhan ravi
on 20 Jan 2019
Edited: madhan ravi
on 20 Jan 2019
n=6; % number of elements in a row
B=mat2cell((1:20).',repelem(1:4,2));
B=cellfun( @transpose,B,'un',0);
R=cellfun( @(x) [x zeros(1,6-numel(x))],B,'un',0);
vertcat(R{:})
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