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Random multiply by negative one

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Alma Bezares
Alma Bezares 2016-2-22
评论： jgg 2016-2-22
Hello, I bootstrapped a 1000 simulation from my data with replacement and now, I would like to randomly multiply it by one or negative one, but I am not sure how to do that.
My initial guess was to do the following: y3=y2*randi([-1,1],22528,1000), but I guess it will generate pseudorandom integers in this range, which includes zero. Any suggestion on how to do this will be highly appreciated.
Thanks
Alma

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回答（3 个）

jgg
jgg 2016-2-22
编辑：jgg 2016-2-22
Try this:
A = [1,-1];
rand_nums = A(randi([1,2],22528,1000));
Azzi Abdelmalek
Azzi Abdelmalek 2016-2-22
编辑：Azzi Abdelmalek 2016-2-22
out=2*randi([0 1],22528,1000)-1
Alma Bezares
Alma Bezares 2016-2-22
Thank you so much. The code A = [1,-1]; rand_nums = A(randi([1,2],22528,1000));
did the trick. Thanks!
  1 个评论
jgg
jgg 2016-2-22
You should accept the answer then, so other people can see the solution!

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