Need to understand how 'indexing' is done in R: > x <- read.table(textConnection(" Price + 2010-10-11 99 + 2010-10-12 101 + 2010-10-13 102 + 2010-10-14 103 + 2010-10-15 99 + 2010-10-18 98 + 2010-10-19 97 + 2010-10-20 101 + 2010-10-21 101 + 2010-10-22 101"), header = TRUE) > closeAllConnections() > x Price 2010-10-11 99 2010-10-12 101 2010-10-13 102 2010-10-14 103 2010-10-15 99 2010-10-18 98 2010-10-19 97 2010-10-20 101 2010-10-21 101 2010-10-22 101 > x[x$Price > 100,, drop = FALSE] Price 2010-10-12 101 2010-10-13 102 2010-10-14 103 2010-10-20 101 2010-10-21 101 2010-10-22 101 >
On Sat, Oct 23, 2010 at 9:56 PM, Jason Kwok <jayk...@gmail.com> wrote: > Price > 2010-10-11 99 > 2010-10-12 101 > 2010-10-13 102 > 2010-10-14 103 > 2010-10-15 99 > 2010-10-18 98 > 2010-10-19 97 > 2010-10-20 101 > 2010-10-21 101 > 2010-10-22 101 > > I have this dataset and I only want to return instances when the Price is > > 100. > > If I use the code: Price > 100 then it will evaluate each entry as "TRUE" or > "FALSE". What is the code to only return "TRUE" results? > > Thanks, > > Jay > > [[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. > -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem that you are trying to solve? ______________________________________________ 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.