Robuste lineare Regression
Robuste lineare Regressionsschätzungen können nützlich sein, wenn es Probleme mit
Heteroskedastizität und Ausreißern in den Daten gibt. Die Funktion rlm()
, ebenfalls aus dem Paket MASS
, passt Modelle über einen M- oder
MM-Schätzer an:
# Standard-S3-Methode: rlm(x, y, weights, ..., w = rep(1, nrow(x)), init = "ls", psi = psi.huber, scale.est = c("MAD", "Huber", "proposal 2"), k2 = 1.345, method = c("M", "MM"), wt.method = c("inv.var", "case"), maxit = 20, acc = 1e-4, test.vec = "resid", lqs.control = NULL) # S3-Methode für die Klasse "formula": rlm(formula, data, weights, ..., subset, na.action, method = c("M", "MM", "model.frame"), wt.method = c("inv.var", "case"), model = TRUE, x.ret = TRUE, y.ret = FALSE, contrasts ...
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