Hi, Try this,
set.seed(2) # reproducible d = matrix(sample(1:20,20), 4, 5) d d[ d[ ,2] == 18 , ] You may need to test with all.equal if your values are subject to rounding errors. HTH, baptiste 2009/11/16 frenchcr <frenc...@btinternet.com>: > > > I have 20 columns of data, and in column 5 I have a value of 17600 but I > dont know which row this value is in (i have over 300,000 rows). > > I'm trying to do 2 things: > > 1) I want to find out which row in column 5 has this number in it. > > 2) Then I want to print out that row with all the column headers so i can > look at the other parameters in the row that are associated with this value. > > > How do i do it? > > > -- > View this message in context: > http://old.nabble.com/printing-a-single-row%2C-but-dont-know-which-row-to-print-tp26376647p26376647.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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.