search for: daymean

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2008 May 14
1
rlm and lmrob error messages
...using R2.7.0 (on Windows 2000) and I'm trying do run a robust regression on following model structure: model = "Y ~ x1*x2 / (x3 + x4 + x5 +x6)" where x1 and x2 are both factors (either 1 or 0) and x3.....x6 are numeric. The error code I get when running rlm(as.formula(model), data=daymean) is: error in rlm.default(x, y, weights, method = method, wt.method = wt.method, : 'x' is singular: singular fits are not implemented in rlm As singular.ok = TRUE is default with lmrob from the robustbase package, I tried running the model using lmrob, but I get following error messa...