From: Bernhard Baumgartner <bernhard.baumgartner_at_wiwi.uni-regensburg.de>

Date: Thu 09 Feb 2006 - 01:21:46 EST

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Thu Feb 09 01:41:52 2006

Date: Thu 09 Feb 2006 - 01:21:46 EST

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

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Thu Feb 09 01:41:52 2006

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