Hi, thanks for the answer. In this case, the row named "601" is not the 601st row of the table, but the 117th. data[601,] actually refers to a non existing row. I was wondering why data[-"601,] generates an error message whereas data["601",] does not?
2016-09-20 19:08 GMT+02:00 Bert Gunter <bgunter.4...@gmail.com>: > Hint: "601" is not 601. > > Have you gone through any R tutorials? > > Cheers, > Bert > Bert Gunter > > "The trouble with having an open mind is that people keep coming along > and sticking things into it." > -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) > > > On Tue, Sep 20, 2016 at 5:42 AM, Pauline Laïlle > <pauline.lai...@gmail.com> wrote: > > Dear all, > > > > I built a dataframe with read.csv2(). Initially, row names are integers > > (order of answers to a survey). They are listed in the csv's first > column. > > The import works well and my dataframe looks like I wanted it to look. > > > > Row names go as follows : > > [1] "6" "29" "31" "32" "52" "55" "63" "71" "72" "80" "88" > "89" > > "91" "93" "105" "110" "111" "117" "119" "120" > > [21] "122" "127" "128" "133" "137" "140" "163" "165" "167" "169" "177" > > "178" "179" "184" "186" "192" "193" "200" "201" "228" > > etc. > > > > I would like to drop rows "601" & "604" to clean the dataframe. > > > > While data["601",] shows me the first row i'd like to drop, data[-"601",] > > returns the following : > > Error in -"601" : invalid argument to unary operator > > > > idem with data[c("601","604"),] and data[-c("601","604"),] > > > > It is the first time that I run into this specific error. After reading a > > bit about it I still don't understand what it means and how to fix it. > > > > Thanks for reading! > > Best, > > Pauline. > > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > > 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. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.