[R] Reordering levels of a factor when the factor is part of a data frame

Hello R-users,    I have a data frame whose names of columns I don't know a priori, but the user of my code will know them. The user is supposed to save the name of the column that will need some reordering of the levels of the factor later on. The name of the column will be saved in an object

Re: [R] Reordering levels of a factor when the factor is part of a data frame

Hi Judith, You should use double brackets, like this: df[[variab]]-factor(df[[variab]], levels=c(A2B,B31,C33)) see ?[ for details, noting that the help page assumes that you know data.frames are list-like objects. Best, Ista On Mon, Feb 6, 2012 at 2:03 PM, Judith Flores jur...@yahoo.com

Re: [R] Reordering levels of a factor when the factor is part of a data frame

6-02-2012, 11:03 (-0800); Judith Flores escriu: The name of the column will be saved in an object called: variab the data frame is called df. If I try to the do following: df[variab]-factor(df[variab], levels=c(A2B,B31,C33)) it won't work because df[variab] is a data frame. I