Gabor Grothendieck <[EMAIL PROTECTED]> writes: > 'lm' gives an error when using variables with spaces in them > in certain cases (but not all): > > my.list <- list(`a 1` = 1:4, `a 2` = 11:14) > lm(`a 1` ~ ., my.list) # Error : Object "a.1" not found > > # The following work ok so it does work in many cases: > > lm(`a 1` ~ ., as.data.frame(my.list, optional = TRUE)) # ok > lm(`a 1` ~ `a 2`, my.list) # ok > > Admittedly ?lm says that the data argument should be > a data frame or environment so this is not strictly a bug > but it seems to work with a list and the code even seems to > coerce it to a data frame. > > I am using Windows XP "R version 2.1.0, 2005-04-18".
As you probably gathered, the issue is that there's an as.data.frame() without optional=TRUE sitting inside terms.formula which causes the "." to expand to a.1 + a.2. Sounds like that's unconditionally a bug, but I'm a little unsure... -- O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ R-devel@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
