Re: [R] model frame and formula mismatch in model.matrix()

2013-04-15 Thread jul 2-pom
Hi Eva, you're right, it works with 50 variables. Then, how could I change this variable limit in the lm function? Thank you very much for your help. Julien. -- View this message in context: http://r.789695.n4.nabble.com/model-frame-and-formula-mismatch-in-model-matrix-tp4664093p4664226.html

Re: [R] model frame and formula mismatch in model.matrix()

2013-04-13 Thread Eva Prieto Castro
[[ni]]) <- contrasts.arg[[nn]]     }     }     }     }     else {     isF <- FALSE     data <- data.frame(x = rep(0, nrow(data)))     }     ans <- .Internal(model.matrix(t, data))     cons <- if (any(isF))     lapply(data[isF], function(x) attr(x, "

[R] model frame and formula mismatch in model.matrix()

2013-04-12 Thread jul 2-pom
Hello everyone, I am trying to fit the following model All X. variables are continuous, while the conditions are categoricals. model <- lm(X2 +X3+X4+X5+X6+X7+X8+X9+X10+X11+X12+X13+X14+X15+X16+X17+X18+X19+X20+X21+X22+X23+X24+X25+X26+X27+X28+X29+X30+X31+X32+X33+X34+X35+X36+X37+X38+X39+X40+X41+X42+X