randomly select a number from a matrix
1 view (last 30 days)
Show older comments
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
0 Comments
Accepted Answer
Torsten
on 19 May 2015
indexarray=randi(27,365,1);
For k=1:365
Vector(k)=Matrix(k,indexarray(k,1));
end
Best wishes
Torsten.
More Answers (1)
Andrei Bobrov
on 19 May 2015
Edited: Andrei Bobrov
on 19 May 2015
n = size(Matrix);
out = Matrix(sub2ind(n,(1:n(1))',randi(n(2),n(1),1)));
See Also
Categories
Find more on Creating and Concatenating Matrices in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!