topic Re: Proc PLM Error: A Data Set is Required to Produce Effect Plots for Your Model in Statistical Procedures

Proc PLM Error: A Data Set is Required to Produce Effect Plots for Your Model

lkeyes — Wed, 24 Apr 2019 17:01:01 GMT

As the Subject line says, I'm getting an error in Proc PLM telling me that: "A data set is required to produce effect plots for your model". Insofar as I know, I've given it a dataset in the store??

This isn't exactly a huge issue, as I can run all the Effectsplots within the model statement. However, it'd be nice not to have to re-run the model every time I'd like to look at a different plot ^_^

Any insight into the issue (or glaring errors in my syntax) is greatly appreciated!!

Thanks!

Below is the code I'm using:

proc genmod data=clabsi;
class hiin region year_num;
model numerator = hiin|region|year_num/ dist=nb link=log offset=ln_days type3;
store work.clabsiNB;
run;

proc plm restore=clabsiNB;
	effectplot interaction(x=region sliceby=hiin) / clm connect;
	effectplot interaction(x=hiin sliceby=region) / clm connect;
run;

Re: Proc PLM Error: A Data Set is Required to Produce Effect Plots for Your Model

Amitpsingh1 — Wed, 24 Apr 2019 18:45:17 GMT

I think you should not select work folder to store the dataset as it gets
deleted upon closing of the session.

Re: Proc PLM Error: A Data Set is Required to Produce Effect Plots for Your Model

lkeyes — Wed, 24 Apr 2019 19:31:58 GMT

You are correct! If this were a production level project, I would most definitely want to save this in a directory that wasn't wiped after every session. However, this happens to be more "free-time modeling", and I'm not worried about loosing anything except the actual SAS file.

To my point, though, even if i did save the model into a non-work directory, I still wouldn't be able to run the Effectplot as PLM keeps giving me the: "A data set is required to produce Effect plots for your model" error =/

Either way, thank you for sharing your advice!!

Re: Proc PLM Error: A Data Set is Required to Produce Effect Plots for Your Model

MichaelL_SAS — Thu, 25 Apr 2019 14:15:00 GMT

Good question. The item store you provide as input to PROC PLM contains a summary of a statistical model that can be used to perform post-fitting statistical analyses. The item store does not save the observations that were used to fit the statistical model and is different than a SAS data set. This gets discussed in the Basic Features section of the PROC PLM documentation.

For your example I believe the reason you are getting the ERROR about needing a data set to produce the effect plot is because your model contains an offset variable. For models with an offset variable the EFFECTPLOT statement will compute predicted values only at the observation values unless the NOOFFSET option is specified. There is a note mentioning this is the detailed documentation for the EFFECTPLOT statement in the Shared Concepts and Topics chapter.

Re: Proc PLM Error: A Data Set is Required to Produce Effect Plots for Your Model

lkeyes — Thu, 25 Apr 2019 14:20:34 GMT

@MichaelL_SAS Thank you so much!! That totally makes sense, and works. Also, thanks for the reference material