MATLAB Answers

How o generate random integer value?

25 views (last 30 days)
SM
SM on 15 Jul 2020 at 23:29
Commented: SM on 16 Jul 2020 at 0:15
Example:
I have used
A=randi([1 10],1,12)
output:
A=[ 1 9 1 6 7 8 3 7 9 7 8 5]
Is it possible to generate random integer values in interval [1 10], excluding 3, 6 and 8 from the interval having said that the size of the array 1 by 12 remains same?

  0 Comments

Sign in to comment.

Accepted Answer

John D'Errico
John D'Errico on 15 Jul 2020 at 23:43
Edited: John D'Errico on 15 Jul 2020 at 23:45
You want to allow the numbers [1 2 4 5 7 9 10]. So just generate a random integer from 1 to 7. Then use that vector to index the allowed set.
allowed = [1 2 4 5 7 9 10];
A = allowed(randi(7,[1,12]));
If you have some more difficult set to allow, then use setdiff.
allowed = setdiff(1:10,[3 6 8]);

  1 Comment

SM
SM on 16 Jul 2020 at 0:15
First option is more suitable for my problem. Thank you John!

Sign in to comment.

More Answers (1)

madhan ravi
madhan ravi on 15 Jul 2020 at 23:40
a = 1:10;
No_vals = [3, 6, 8];
A = setdiff(a, No_vals);
Wanted = A(randi(numel(A), [1, 12]))

  1 Comment

SM
SM on 16 Jul 2020 at 0:14
Thank you Ravi....Your solution is more comprehensive and easy to understand.

Sign in to comment.

Tags