BookmarkSubscribeRSS Feed
🔒 This topic is solved and locked. Need further help from the community? Please sign in and ask a new question.
stoffprof
Calcite | Level 5

I need to randomly choose k integers between 1 and T without replacement.

Here's what I've come up with:

T=60;

k=15;

/* random vector for choosing integers */

r = j(T,1,0);

call randgen(r,'uniform');


/* find indices from sorting r */

call sortndx( integers, r, {1});


/* take first k integers */

draw = integers[1:k];

I need to do it many times, and I'd rather avoid looping through this, so I'm wondering if anyone has a better solution.

1 ACCEPTED SOLUTION

Accepted Solutions
Rick_SAS
SAS Super FREQ

There are many ways. Do you have SAS/IML 12.1 (SAS 9.3m2)? If so, use

s = sample(1:60, {15 100}, "WOR");

The sample space is 1:60.  The sample size is 15.  The number of independent draws is 100. The samplnig is done without replacement.

View solution in original post

2 REPLIES 2
Rick_SAS
SAS Super FREQ

There are many ways. Do you have SAS/IML 12.1 (SAS 9.3m2)? If so, use

s = sample(1:60, {15 100}, "WOR");

The sample space is 1:60.  The sample size is 15.  The number of independent draws is 100. The samplnig is done without replacement.

stoffprof
Calcite | Level 5

Perfect, thanks Rick. I made sure to update to 9.4 (12.3) after your recent blog post.

sas-innovate-2024.png

Join us for SAS Innovate April 16-19 at the Aria in Las Vegas. Bring the team and save big with our group pricing for a limited time only.

Pre-conference courses and tutorials are filling up fast and are always a sellout. Register today to reserve your seat.

 

Register now!

Multiple Linear Regression in SAS

Learn how to run multiple linear regression models with and without interactions, presented by SAS user Alex Chaplin.

Find more tutorials on the SAS Users YouTube channel.

From The DO Loop
Want more? Visit our blog for more articles like these.
Discussion stats
  • 2 replies
  • 853 views
  • 1 like
  • 2 in conversation