dataframe subset
Hi something like xx<-data.frame(x=sample(1:10,100,replace=T)) y<-c(2,5,8) xx[xx$x%in%y,] HTH Petr
On 8 Feb 2006 at 15:21, Bernhard Baumgartner wrote:
From: "Bernhard Baumgartner" <bernhard.baumgartner at wiwi.uni-regensburg.de> Organization: Universitaet Regensburg To: r-help at stat.math.ethz.ch Date sent: Wed, 08 Feb 2006 15:21:46 +0100 Priority: normal Subject: [R] dataframe subset
I have a dataframe with a column, say "x" consisting of values, each value appearing different times, e.g. x: 1,1,1,1,2,2,4,4,4,9,10,10,10,10,10 ... and a vector, including e.g.: y: 2,9,10,... I need a subset of the dataframe: all rows where x is equal to one of the values in y. Currently I use a loop for this, but because x and y are large this is very slow. Is there any idea how to solve this problem faster? Thank you, Bernhard
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