Thanks, guys! Alan
On Sun, May 30, 2010 at 5:35 AM, Marshall Feldman <ma...@uri.edu> wrote: > Besides data.table, there's the hash package. It does not use data.frame > type structures but is a bit more flexible. > > Marsh Feldman > > On 5/30/10 [May 30, 10] 6:00 AM, r-help-requ...@r-project.org wrote: >> >> Message: 40 >> Date: Sun, 30 May 2010 09:24:22 +0100 >> From: Patrick Burns<pbu...@pburns.seanet.com> >> To:r-help@r-project.org,alan....@gmail.com >> Subject: Re: [R] Data Frame as Hash Table >> Message-ID:<4c0220b6.7090...@pburns.seanet.com> >> Content-Type: text/plain; charset=ISO-8859-1; format=flowed >> >> You might want to investigate the 'data.table' >> package. >> >> On 30/05/2010 09:03, Alan Lue wrote: >> >>> >>> > I'm interested in using a data frame as if it were a hash table. For >>> > instance if I had the following, >>> > >>> >>>> >>>> >> (d<- data.frame(key=seq(0.5, 3, 0.5), value=rnorm(6))) >>>> >>> >>> > key value >>> > 1 0.5 -1.118665122 >>> > 2 1.0 0.465122921 >>> > 3 1.5 -0.529239211 >>> > 4 2.0 -0.147324638 >>> > 5 2.5 -1.531503795 >>> > 6 3.0 -0.002720434 >>> > >>> > Then I'd like to be able to quickly retrieve the "value" of "key" 1.5 >>> > to get -0.53. How would one go about doing this? >>> > >>> > Yours, >>> > Alan Lue >>> > >>> > ______________________________________________ >>> > r-h...@r-project.org mailing list >>> > https://stat.ethz.ch/mailman/listinfo/r-help >>> > PLEASE do read the posting >>> > guidehttp://www.R-project.org/posting-guide.html >>> > and provide commented, minimal, self-contained, reproducible code. >>> > >>> >> >> -- Patrick Burns pbu...@pburns.seanet.com http://www.burns-stat.com (home >> of 'Some hints for the R beginner' and 'The R Inferno') > > -- Alan Lue Master of Financial Engineering UCLA Anderson School of Management ______________________________________________ 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.