Hello, It looks to me as if the ! logical operator cannot be called when subsetting a data.frame. In the example below, the value column has two factor levels (but my typical datasets have more), and what I am trying to do is to exclude all lines for which the "value" is different from "A". I have got a syntax error message everytime I try to use the subset() function. Unfortunatelly, the help on the subset function or the logical operators is not really specific on the way to implement this type of exclusion subset?
Can you please point to me my syntax mistake or indicate a method to get this type of data.frame subset ? Thank you in advance ID value 1 1 1.2 2 2 1.2 3 3 1.2 4 4 1.2 5 5 A 6 6 A 7 7 A 8 8 A subset(mdat,value!"A") Error: syntax error, unexpected '!', expecting ',' in "subset(mdat,value!" Sebastien ______________________________________________ R-help@stat.math.ethz.ch 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.
