Create a random Matrix
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I have a 8 column vector n*1. Can I create a Random matrix of n*8?
The function must take one value from each vector and create a matrix with 8 columns and n rows.
Please help me :-)
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Jan
2011년 10월 24일
"I have a 8 column vector" sounds like a single vector. But "from each vector" might mean n vectors. Confusing.
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Andrei Bobrov
2011년 10월 24일
A1,A2,..,A8 - your vectors (nx1), let n = 5;
for j1 = 1:8, eval([sprintf('A%d',j1),'=randi(20,5,1)']); end
A = eval(['[',sprintf('A%d,',1:8),']'])
out=A(bsxfun(@plus,cell2mat(arrayfun(@(x)randperm(n)',(1:8),'un',0)),(0:7)*n))
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추가 답변 (1개)
Walter Roberson
2011년 10월 24일
rv(:,1) = randomvector1;
rv(:,2) = randomvector2;
rv(:,3) = randomvector3;
....
rv(:,4) = randomvector4;
rants = zeros(8, n);
for K = 1:n
rants(:,K) = A Random Selection of One Entry Per Column from rv
end
How to do "A Random Selection of One Entry Per Column from rv" is left to you to work on in more detail. I will hint that it involves using rand().
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Walter Roberson
2011년 10월 30일
floor(1 + n * rand())
will give you a random row number.
If I say much more than I will be completing your assignment for you.
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