Hi, I am trying to build a series of rlm models. I have my data frame and the models will be built using various coulmns of the data frame.
Thus a series of models would be m1 <- rlm(V1 ~ V2 + V3 + V4, data) m2 <- rlm(V1 ~ V2 + V5 + V7, data) m3 <- rlm(V1 ~ V2 + V8 + V9, data) I would like to automate this. Is it possible to use a string in place of the formula? I tried doing: fmla <- sprintf('V1 ~ V%g + V%g + V%g',2,3,4) m1 <-rlm(fmla,data) I get: Error in qr(x) : NA/NaN/Inf in foreign function call (arg 1) In addition: Warning message: NAs introduced by coercion I can understand why this method results in the error but is there any way to get around this? Thanks, ------------------------------------------------------------------- Rajarshi Guha <[EMAIL PROTECTED]> <http://jijo.cjb.net> GPG Fingerprint: 0CCA 8EE2 2EEB 25E2 AB04 06F7 1BB9 E634 9B87 56EE ------------------------------------------------------------------- Gods are fragile things; they may be killed by a whiff of science or a dose of common sense. -- Chapman Cohen ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help