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    Computing a spline for a linear regression in SPSS

    Hi everybody, is it possible to compute a spline for a predictor variable directly in SPSS or do I have to use another programm like R and then import the computed spline model? I then want to enter the spline variable (I know where the knot should be and I need only one knot) as a predictor...
  2. G

    Modelling a variable

    Hi everybody, my problem is a variable (age) that I wish to enter into linear regression - but, the variable is not linear. So, I want to model it. But, it doesn't work so far. I already tried: log10, exp, ², √, and /1. Is there anything else I could try? I already talked to a...