About PBG

PBG · ‎06-23-2017

Thanks

PBG · ‎06-23-2017

Thank you both for your help.

PBG · ‎06-23-2017

Thanks for your response @WarrenKuhfeld. Yes, that could be done, but I would like to vary the seed to average-out the biases (some of the psuedorandomness) of any single seed. Or is this logic flawed? What role does the seed play in the generation of random values, precisely? In any case, as I'm entirely new to SAS, this could be a great learning experience for me as it pertains to loops/macros. Thanks so much for your help.

PBG · ‎06-23-2017

I have this code which, given an input covariance matrix, randomly draws 1000 values for each of four normally-distributed variables. It's easy enough to change the seed manually to generate another set of 1000 random variable values, but I'm looking to create 1000 or more of these such sets, and to average them together. Can this be done with a sort of loop or macro? Any ideas as to how to go about automating this? Please share. Thanks for your help! Data RandomValueGeneratorStatistics (type=COV); input _TYPE_ $ _NAME_ $9. variable1 variable2 variable3 variable4; datalines; COV variable1 0.999368288 0.009398213 0.075083647 0.453177098 COV variable2 0.009398213 0.000155024 0.000878636 0.006372190 COV variable3 0.075083647 0.000878636 0.008894056 0.043200581 COV variable4 0.453177098 0.006372190 0.043200581 0.999368288 MEAN 3.217123172 42.69388108 3.893316488 8605.147733 ; run; Proc Simnorm data=RandomValueGeneratorStatistics outsim=ssim numreal = 1000 seed = 54321; var variable1 variable2 variable3 variable4; run;

PBG · ‎06-20-2017

Works like a charm! Thank you very much for your help through this @jdwaterman91.

PBG · ‎06-20-2017

Same as before: "ERROR: COV matrix incomplete in data set..." My variable names are actually written with capital 'V'. Could that be a problem? I'll just copy-paste the code you kindly provided before and try..

PBG · ‎06-20-2017

Precisely the code I have! I'm not sure why it's not working for me the same. That's exactly the result I'm looking for!

PBG · ‎06-20-2017

I did do so..no luck unfortunately.

PBG · ‎06-20-2017

Appreciate your help very much, thanks @jdwaterman91. Am now using this matrix: COV variable1 0.999368288 0.009398213 0.075083647 0.453177098 COV variable2 0.009398213 0.000155024 0.000878636 0.006372190 COV variable3 0.075083647 0.000878636 0.008894056 0.043200581 COV variable4 0.453177098 0.006372190 0.043200581 0.999368288 MEAN 3.217123172 42.69388108 3.893316488 8605.147733 receive 'ERROR: COV matrix incomplete in data set'. Is it possible that certain of the matrix items are so small that they are interpreted incorrectly, (e.g. 0.000155024)?

PBG · ‎06-20-2017

Thanks for your help @jdwaterman91. I adjusted the variable length parameter and made sure the matrix I'm actually using is symmetric (I had mistyped some entries). What is meant by 'positive-definite'? Is this a reason, that my matrix is not such, I mean, that I still throw "ERROR: COV matrix is incomplete in data set?" Thanks for your help.

PBG · ‎06-20-2017

Thanks for your help @Ksharp. The matrix I'm actually using is in fact symmetric now. I don't have an IML license unfortunately. Any more ideas? Thanks for your help.

PBG · ‎06-20-2017

I should say EG 6. Is it possible that the variable names as specified are too long, and so causing the matrix to be read-in incorrectly?

PBG · ‎06-19-2017

I'm brand new to SAS, trying to use it to generate random values for four, normally-distributed, collinear variables. A colleague of mine has prepared the following code, but it throws "ERROR: COV matrix is incomplete in data set." Data RandomValueGeneratorStatistics (type=COV) ; input _TYPE_ $ _NAME_ $ variable1 variable2 variable3 variable4; datalines ; COV variable1 0.739191357 0.276109171 0.100056621 470.1092606 COV variable2 0.876109171 0.327432304 0.648272489 0.611948925 COV variable3 0.900056621 0.848272489 0.163812314 0.558222994 COV variable4 470.1092606 0.611948925 0.358222994 5474224.269 MEAN 4.217123172 41.69388108 4.893316488 8606.147733 ; run; Proc Simnorm data=RandomValueGeneratorStatistics outsim=ssim numreal = 1000 seed = 54321 ; var variable1 variable2 variable3 variable4 ; run; Using version 6.100.0.2870. Any ideas as to why? Please share. Thanks for your help!

Online Status	Offline
Date Last Visited	‎06-23-2017 03:09 PM

Re: Loop/Macro to Iterate Seed of Random Value Generator

Re: Loop/Macro to Iterate Seed of Random Value Generator

Re: Loop/Macro to Iterate Seed of Random Value Generator

Loop/Macro to Iterate Seed of Random Value Generator

Re: COV matrix incomplete

Re: COV matrix incomplete

Re: COV matrix incomplete

Re: COV matrix incomplete

Re: COV matrix incomplete

Re: COV matrix incomplete

Re: Loop/Macro to Iterate Seed of Random Value Generator

Re: Loop/Macro to Iterate Seed of Random Value Generator

Re: Loop/Macro to Iterate Seed of Random Value Generator

Re: COV matrix incomplete

Re: COV matrix incomplete

Re: COV matrix incomplete

Re: Loop/Macro to Iterate Seed of Random Value Generator

Re: Loop/Macro to Iterate Seed of Random Value Generator

Re: Loop/Macro to Iterate Seed of Random Value Generator

Loop/Macro to Iterate Seed of Random Value Generator

Re: COV matrix incomplete

Re: COV matrix incomplete

Re: COV matrix incomplete

Re: COV matrix incomplete

Re: COV matrix incomplete

Re: COV matrix incomplete

Re: COV matrix incomplete

Re: COV matrix incomplete

COV matrix incomplete