randomly select a number from a matrix

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Camilla Santicoli
Camilla Santicoli 2015-5-19
编辑： Andrei Bobrov 2015-5-19
Hi all. I have a 365x27 matrix of values where the rows are the different days of a year (365) and the columns the number of years that I am considering (27). What I would like to do is to create a vector 365x1 where every day one value is randomly selected from the initial matrix. So, for the first day the function should randomly select a value out of the first row of the inital matrix, for the second day a value randomly taken from the second row of the inital matrix and so on. Does someone know how to do it? Thanks

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采纳的回答

Torsten
Torsten 2015-5-19
indexarray=randi(27,365,1);
For k=1:365
Vector(k)=Matrix(k,indexarray(k,1));
end
Best wishes
Torsten.

更多回答（1 个）

Andrei Bobrov
Andrei Bobrov 2015-5-19
编辑：Andrei Bobrov 2015-5-19
n = size(Matrix);
out = Matrix(sub2ind(n,(1:n(1))',randi(n(2),n(1),1)));

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