MATLAB Answers

Random multiply by negative one

16 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

  0 Comments

Sign in to comment.

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));

  0 Comments

Sign in to comment.


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

  0 Comments

Sign in to comment.


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.