> -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of Ken > Sent: Wednesday, August 03, 2011 12:13 PM > To: Jeffrey Joh > Cc: <r-help@r-project.org> > Subject: Re: [R] Convert matrix to numeric > > How about > Matrix[1:5,]=as.numeric(Matrix[1:5,]) > -Ken Hutchison > > On Aug 3, 2554 BE, at 3:04 PM, Jeffrey Joh <johjeff...@hotmail.com> > wrote: > > > > > I have a matrix that looks like this: > > > > > > structure(c("0.0376673981759913", "0.111066500741386", "1", "1103", > > "18", "OPEN", "DEPR", "0.0404073656092023", "0.115186044704599", > > "1", "719", "18", "OPEN", "DEPR", "0.0665342096693433", > "0.197570061769498", > > "1", "1103", "18", "OPEN", "DEPR", "0.119287147905722", > "0.356427096010845", > > "1", "1103", "18", "OPEN", "DEPR"), .Dim = c(7L, 4L), .Dimnames = > list( > > c("Sn", "SlnC", "housenum", "date", "hour", "flue", > "pressurization" > > ), c("10019.BLO", "1002.BLO", "10020.BLO", "10021.BLO"))) > > > > > > > > How do I convert rows 1-5 to numeric? I tried mode() <- "numeric" > but that doesn't change anything. > >
Ken, You can't store the numeric values back in the matrix, because rows 6 and 7 contain character values. Everything will just be converted back to character. You need to create a new matrix for the numeric values. Hope this is helpful, Dan Daniel J. Nordlund Washington State Department of Social and Health Services Planning, Performance, and Accountability Research and Data Analysis Division Olympia, WA 98504-5204 ______________________________________________ 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.
