Re: [R] data.frame: how to extract parts

On 17-Jan-09 02:57:13, Jörg Groß wrote: > Hi, > I have a problem with the R syntax. > It's perhaps pretty simple, but I don't understand it ... > > I can extract a column from a data.frame with the following code > for example ... > > b$row1[b$row1 == "male"] > > so I see all male-entries. > >

Re: [R] data.frame: how to extract parts

You are missing a comma. You are addressing the dataframe as if it were a matrix and you want to extract all the rows that match: only.male <- b[b$row1 == "male",] On Fri, Jan 16, 2009 at 9:57 PM, Jörg Groß wrote: > Hi, > > I have a problem with the R syntax. > It's perhaps pretty simple, but I

[R] data.frame: how to extract parts

Hi, I have a problem with the R syntax. It's perhaps pretty simple, but I don't understand it ... I can extract a column from a data.frame with the following code for example ... b$row1[b$row1 == "male"] so I see all male-entries. But I cannot extract all lines of a data.frame dependin