Output as a SAS data set

[Abimal_Zippi]

How to write an interaction between a B-spline basis function and a continuous variable to a SAS data set?

[andreas_lds]

What would you expect to be stored in the dataset?

[ballardw]

Please at least show the code used to create the B-spline values or function so we have some of chance of providing a solution that uses the approach you used.

[Abimal_Zippi]

proc transreg data=have design;
model bspl(x / nknots=2);
id id amount;
output out=spline_design;
run;

[Abimal_Zippi]

proc transreg data=have design;
model bspl(x / nknots=2); 
id id amount;
output out=spline_design;
run;

I wanted to store the interaction between spl(x) and amount into SAS data set.

[Ksharp]

Try PROC GLMSELECT.
https://communities.sas.com/t5/Japan-SAS-Discussion/%E9%87%8D%E5%9B%9E%E5%B8%B0%E5%88%86%E6%9E%90%E3...

[Abimal_Zippi]

The goal is to output the interaction as a design matrix, not an analysis of the spline effect of a predictor in the model.

[Ksharp · Accepted solution]

Check option OUTDESIGN= :

proc glmselect data=cars outdesign(addinputvars fullmodel)=SplineBasis;