topic Re: Is there a way to run loess or bspline or adaptivereg directly in CAS in Statistical Procedures

Is there a way to run loess or bspline or adaptivereg directly in CAS

PaalNavestad — Tue, 07 Sep 2021 10:18:44 GMT

Hi we are working on a workflow where we have sporadic measurements. The data is not stationary with trend changes at infrequent intervals. There are no natural cycles in the data. We have found that smoothing the data and checking the residuals for outliers seem to work well.

To make the workflow as efficent as possible we would like to run the whole flow in CAS.

However we have not found any CAS methods for LOESS or Bspline or Mars regressions (adaptive reg).

Can anybody please guide us in the right direction ?

Re: Is there a way to run loess or bspline or adaptivereg directly in CAS

StatDave — Tue, 07 Sep 2021 14:22:05 GMT

In SAS Viya, you could either use PROC GAMMOD (or GAMSELECT if model selection methods are needed), or if you prefer to use CAS actions, you can use the related actions in the Generalized Additive Model action set. These allow fitting a model using thin-plate regression splines. See the SAS Viya documentation for details.

Re: Is there a way to run loess or bspline or adaptivereg directly in CAS

PaalNavestad — Tue, 07 Sep 2021 14:44:38 GMT

Thanks,

Re: Is there a way to run loess or bspline or adaptivereg directly in CAS

Rick_SAS — Wed, 24 Nov 2021 11:28:21 GMT

In general, if you are looking for computations on the CAS server that are similar to what you would find in SAS/STAT procedures, look at the

CAS-enabled statistical procedures in SAS Visual Statistics
The CAS actions for statistics

Similar documentation exists for CAS-enabled econometrics/time series procedures and the econometric actions.

As statdave_sas says, I'd recommend PROC GAMMOD.