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Create a 1000 x 4 matrix, with the first column switching between 0,1 (starting with 1), and the second column repeating itse

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b=zeros(1000,4);
b(:,1)=rep([1 0],500);
b(:,2)=rep([1 2 3 4 5],200);
b(:,3)=4;
b(:,4)=rep([0 1 2 3],250);
b
function [b]= rep(a,n)
b=[];
for i=1:n
b=[b a];
end
b=b';
end

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