Thanks all for your help. Anjan
On Sun, Oct 24, 2010 at 1:38 PM, Jorge Ivan Velez <jorgeivanve...@gmail.com>wrote: > Hi Anjan, > > Please consider the following example: > > > x <- c(2, rep(1, 10)) > > all(x == 1) > [1] FALSE > > d <- replicate(10, sample(x, replace = TRUE)) > > d > [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] > [1,] 1 1 1 1 1 1 2 1 1 1 > [2,] 1 1 1 2 1 2 1 2 1 1 > [3,] 1 1 1 1 1 1 1 1 1 1 > [4,] 1 1 1 1 1 1 1 1 2 1 > [5,] 1 1 1 1 2 1 1 1 1 1 > [6,] 2 1 1 1 1 1 1 1 1 1 > [7,] 1 1 1 1 1 1 1 1 2 1 > [8,] 1 1 2 1 1 1 1 1 1 1 > [9,] 1 2 2 1 2 1 1 1 2 1 > [10,] 1 1 1 1 1 1 1 1 1 1 > [11,] 1 1 1 1 1 1 1 1 1 1 > > d[apply(d, 1, function(v) all(v==1)), ] > [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] > [1,] 1 1 1 1 1 1 1 1 1 1 > [2,] 1 1 1 1 1 1 1 1 1 1 > [3,] 1 1 1 1 1 1 1 1 1 1 > > > HTH, > Jorge > > > On Sun, Oct 24, 2010 at 1:32 PM, ANJAN PURKAYASTHA <> wrote: > >> Hi, >> I have a dataframe with 43 columns and a 1000 rows. Each entry in the >> dataframe can be either P or A. >> here is a small chunk: >> c1 c2 ... c43 >> r100 P A ... P >> r101 A A ... A >> r102 P P ... P >> >> How does one subset this data frame to select those rows that have only >> P's >> in them? >> >> Thanks in advance. >> Anjan >> >> >> >> >> -- >> =================================== >> anjan purkayastha, phd. >> research associate >> fas center for systems biology, >> harvard university >> 52 oxford street >> cambridge ma 02138 >> phone-703.740.6939 >> =================================== >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> 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. >> > > -- =================================== anjan purkayastha, phd. research associate fas center for systems biology, harvard university 52 oxford street cambridge ma 02138 phone-703.740.6939 =================================== [[alternative HTML version deleted]] ______________________________________________ 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.
