MATLAB: Create a matrix of this type

for loopmatrix arraymatrix manipulation

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 ?

Best Answer

m = 8;
n = 6;
P = kron(triu(ones(n,m/2)),[1,1]);
P(P>0) = 1:nnz(P);
out = P';

Related Solutions

MATLAB: How rearrange data in a matrix

data=[1 2 3 4 5 6 7 8];
n=numel(data);
R=zeros(n/2,n);
R(:,1:2)=reshape(data,2,[])';
out=cell2mat(arrayfun(@(x) circshift(R(x+1,:),[ 0 2*x]),(0:3)','un',0))

%or

data=[1 2 3 4 5 6 7 8];
n=numel(data);
out=zeros(n/2,n);
out(sub2ind(size(out),repmat((1:n/2),2,1),reshape(1:n,2,[])))=data

%or

EDIT

n=numel(data);
a=[reshape(data,2,[]) ;zeros(n,n/2)];
a=a(:);
a(end-n+1:end)=[];
out=reshape(a,n,n/2)'

MATLAB: Creating a matrix which has particular order of element

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 = 7;
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';

Best Answer

Related Solutions

MATLAB: How rearrange data in a matrix

MATLAB: Creating a matrix which has particular order of element

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