topic Re: How do I output a randon number within an interval in proc iml in SAS/IML Software and Matrix Computations

How do I output a randon number within an interval in proc iml

desireatem — Sat, 02 Feb 2013 23:23:11 GMT

Hello Ladies and Gentlemen,

I am trying to output a random number within a proc iml statement.

For example if i do: A=RANUNI(-1); any time it give a different random number between 0 and 1.

Now I have my interval (Bi, Bi+1) and I want a random number between this interval. Just like RANUNI(-1), I want this interval to change anytime I run it and to vary as I vary my interval

Re: How do I output a randon number within an interval in proc iml

Rick_SAS — Sun, 03 Feb 2013 01:35:32 GMT

See the article How to generate random numbers in SAS - The DO Loop which shows how to use the RANDGEN routine to generate random numbers. If u is in the inerval [0,1] then Bi+u is in the interval you want. You can use CALL RANDSEED(0) if you want the random number stream to be different each time you run the program. Remember also that if you are going to need thousands of random numbers to vectorize the program by allocating an array and filling it: Efficient Sampling - The DO Loop

Re: How do I output a randon number within an interval in proc iml

desireatem — Sun, 03 Feb 2013 06:12:28 GMT

My interval varies and it is like (0.93, 1.41) and I want a random a within the the interval. THe other interval is (0.67,0.83)

Re: How do I output a randon number within an interval in proc iml

1zmm — Tue, 05 Mar 2013 13:23:48 GMT

If the uniform random number you generate equals RN, the random value within a specific interval from LOW to HIGH equals:

Random value = LOW + RN*(HIGH - LOW).

Re: How do I output a randon number within an interval in proc iml

desireatem — Wed, 06 Mar 2013 20:30:59 GMT

Thanks answered