search for: diabp

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2009 Dec 01
1
An R vs. SAS Discrepancy: How do I determine which is correct?
.... The data set is too big to post, but if someone wants it, I can send it. So, here are the (partial) results: From R: Coefficients: Estimate Std. Error t value Pr(>|t|) (Intercept) 61.11434 1.48065 41.275 < 2e-16 *** sexWomen 2.91108 0.35753 8.142 5e-16 *** diabp 0.20675 0.01504 13.746 < 2e-16 *** age -0.08085 0.02088 -3.871 0.000110 *** From SAS (sorry about word-wrap if it happens): Parameter Estimates Parameter Standard Variable Label...
2004 Oct 11
0
lmList - strange problem
...d according to the levels of a grouping factor (gf) and individual 'lm' fits are obtained for each 'data'partition, using a model defined as in "lm". So my call to lmList looks something like: > mg.lis <- lmList(strmbf ~ age1c + gender1 + sysbp.clinic + + diabp.clinic + ldl1 + mets.total + bmi1c | gf, + data = Data, subset= avblock=="normal"); but I get a strange error message: "Error in model.frame.default(formula = form, data = dat, na.action = na.action, : object is not a matrix" If I remove either mets.total or bmi1c...