On Mon, May 3, 2010 at 7:21 PM, wei x1 <weix1_2...@hotmail.com> wrote: > > hell all: > > I have a vector as follows: > >> head(res) > 1007_s_at.value 1053_at.value 117_at.value 121_at.value > 1255_g_at.value > 0.225801033 0.009747404 0.709517954 0.008825740 0.496859178 > 1294_at.value > 0.005091231 > > > > after I convert the res into a data frame I got the following: > > resx<- data.frame(res) >> head(resx) > res > 1007_s_at.value 0.225801033 > 1053_at.value 0.009747404 > 117_at.value 0.709517954 > 121_at.value 0.008825740 > 1255_g_at.value 0.496859178 > 1294_at.value 0.005091231 > > > > as you may see, the first column of resx has no names and it does not appear > as one of dimension of data frame. > > I wonder anyone may have solution to assign a name to it. >
The first column isnt a column! It's the row names. If you want to make a column from the row names, try: > res=c(a=1,b=2,c=3) > resx=data.frame(res) > resx res a 1 b 2 c 3 > resx$names = rownames(resx) > resx res names a 1 a b 2 b c 3 c now it has row names as well as a column (called 'names') with them in. Barry ______________________________________________ R-help@r-project.org 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.
