Thank you for your reply. I added proc sort. The figure is the same with or without adjustment factor as shown below. model oxygen = Weight_spl Age/ selection=none ; or model oxygen = Weight_spl / selection=none ; If I make the program as shown below, the figure bends squishy. proc reg data=SplineBasis; model mpg_city = spl_: Age; output out=out predicted=fit; run; Are there any good solutions? model oxygen = Weight_spl Age/ selection=none ; model oxygen = Weight_spl / selection=none ; とAgeという調整因子を入れる入れないで、figureが同じようです。 そこで、下記のようなプログラムにすると、figureの回帰直線ががたがたになってしまいます。解決策はあるでしょうか。 proc reg data=SplineBasis; model mpg_city = spl_: Age; output out=out predicted=fit; run;
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