Hello, I am trying to "paste" together a formula to use in the mob function of party. This means the formula will be of the form y ~ x1+ ...+xM | z1+..zN.
I am doing some preliminary fits of y ~ x1+ ...+xM, then want to add the conditional part of the equation using update(). Here's the test code: var1 <- 1:78 x1 <- paste("x", var1, sep="") f1 <- paste("f", var1[1:10], sep="") # use first 77 variables fmla <- as.formula( paste("y ~ ", paste(x1[1:77], collapse=" + ", sep=""), sep="")) fmla2 <- update(fmla, paste(". ~ . | ", paste(f1, collapse= " + "), sep="")) # CHANGE x to all 78 variables fmla <- as.formula( paste("y ~ ", paste(x1, collapse=" + ", sep=""), sep="")) fmla2 <- update(fmla, paste(". ~ . | ", paste(f1, collapse= " + "), sep="")) I have run this in Windows and Linux (64 bit) and both fail when using all 78 terms (and anything more than 78 terms). The error message contains Error in parse(text = x) : :1:514: unexpected ')'. Changing the length of the names of the x variables will break the update() with fewer variables, but always with an error referring to just more than 512 characters. There is nothing special about 77 or 78 variables here; I want to do this with hundreds of variables. Is there a workaround to this? [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.