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2011 Feb 25
1
lm - log(variable) - skip log(0)
I want to do a lm regression, some of the variables are going to be affected with log, I would like not no take into account the values which imply doing log(0) for just one variable I have done the following but it doesn't work: lmod1.lm <- lm(log(dat$inaltu)~log(dat$indiam),subset=(!(dat$indiam %in% c(0,1))) and obtain: Error en lm.fit(x, y, offset = offset, singular.ok = singular.ok, ...) : 0 (non-NA) cases lmod1.lm <- lm(log(dat$inaltu)~log(dat$indiam),subset=(!(dat$indiam = 0)), na.action=na.exclude) and obtain Error en lm.fit(x, y,...