Try this: subset(iris, select = - Petal.Length)
On Sat, Oct 17, 2009 at 4:49 PM, Liviu Andronic <landronim...@gmail.com> wrote: > Dear all > What is the easy way to drop a variable by using its name (and not its > number)? Example: >> data(iris) >> head(iris) > Sepal.Length Sepal.Width Petal.Length Petal.Width Species > 1 5.1 3.5 1.4 0.2 setosa > 2 4.9 3.0 1.4 0.2 setosa > 3 4.7 3.2 1.3 0.2 setosa > 4 4.6 3.1 1.5 0.2 setosa > 5 5.0 3.6 1.4 0.2 setosa > 6 5.4 3.9 1.7 0.4 setosa >> head(iris[,-3]) > Sepal.Length Sepal.Width Petal.Width Species > 1 5.1 3.5 0.2 setosa > 2 4.9 3.0 0.2 setosa > 3 4.7 3.2 0.2 setosa > 4 4.6 3.1 0.2 setosa > 5 5.0 3.6 0.2 setosa > 6 5.4 3.9 0.4 setosa >> head(iris[,-which(names(iris)=="Petal.Length")]) > Sepal.Length Sepal.Width Petal.Width Species > 1 5.1 3.5 0.2 setosa > 2 4.9 3.0 0.2 setosa > 3 4.7 3.2 0.2 setosa > 4 4.6 3.1 0.2 setosa > 5 5.0 3.6 0.2 setosa > 6 5.4 3.9 0.4 setosa >> head(iris[,-"Petal.Length"]) > Error in -"Petal.Length" : invalid argument to unary operator > > Is there something more straight-forward than > `-which(names(iris)=="Petal.Length")', to drop a variable using a > string? > Thank you > Liviu > > > > -- > Do you know how to read? > http://www.alienetworks.com/srtest.cfm > Do you know how to write? > http://garbl.home.comcast.net/~garbl/stylemanual/e.htm#e-mail > > ______________________________________________ > 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. > ______________________________________________ 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.
