MATLAB Answers

Random multiply by negative one

9 views (last 30 days)
Alma Bezares
Alma Bezares on 22 Feb 2016
Commented: jgg on 22 Feb 2016
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

Answers (3)

jgg
jgg on 22 Feb 2016
Edited: jgg on 22 Feb 2016
Try this:
A = [1,-1];
rand_nums = A(randi([1,2],22528,1000));

Azzi Abdelmalek
Azzi Abdelmalek on 22 Feb 2016
Edited: Azzi Abdelmalek on 22 Feb 2016
out=2*randi([0 1],22528,1000)-1

Alma Bezares
Alma Bezares on 22 Feb 2016
Thank you so much. The code A = [1,-1]; rand_nums = A(randi([1,2],22528,1000));
did the trick. Thanks!
  1 Comment
jgg
jgg on 22 Feb 2016
You should accept the answer then, so other people can see the solution!

Sign in to comment.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!