Hi Peter, Thanks.
as.matrix() does the trick. - Edward On Wed, May 21, 2008 at 11:31 AM, Peter Alspach <[EMAIL PROTECTED]> wrote: > Edward > > Are you sure mymatrix is, in fact, a matrix and note a dataframe (which > is a list)? I get: > >> is.matrix(mymatrix) > [1] FALSE >> is.data.frame(mymatrix) > [1] TRUE >> samples <- mymatrix[1,] >> llgm <- dgamma(samples, scale=1, shape=2, log = TRUE) > Error in dgamma(x, shape, scale, log) : > Non-numeric argument to mathematical function > > That is, the same error as you when mymatrix is a dataframe. But > convert it to a matrix and: > >> mymatrix <- as.matrix(mymatrix) >> is.matrix(mymatrix) > [1] TRUE >> is.data.frame(mymatrix) > [1] FALSE >> samples <- mymatrix[1,] >> llgm <- dgamma(samples, scale=1, shape=2, log = TRUE) >> llgm > V1 V2 V3 V4 V5 V6 > -99.25657 -84.01700 -237.40735 -201.26922 -170.53122 -159.29770 > > HTH .... > > Peter Alspach > > >> -----Original Message----- >> From: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED] On Behalf Of Edward Wijaya >> Sent: Wednesday, 21 May 2008 2:17 p.m. >> To: r-help@r-project.org >> Subject: [R] Converting Data Types >> >> Hi, >> >> How can I convert the matrices to list. >> >> For example I have this snippet: >> >> samples<-mymatrix[1,] >> print(samples) >> >> which prints: >> >> V1 V2 V3 V4 V5 V6 >> 1 103.9 88.5 242.9 206.6 175.7 164.4 >> >> >> How can I convert the object "samples" such that it prints: >> [1] 103.9 88.5 242.9 206.6 175.7 164.4 >> >> The reason I ask this because I can't use the former >> "samples" object with this function: >> >> llgm <- dgamma(samples, scale=1, shape=2, log = TRUE) >> >> which gives this error: >> e 1374Error in dgamma(x, shape, scale, log) : >> Non-numeric argument to mathematical function >> >> Regards, >> Edward >> >> ______________________________________________ >> 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. >> > > The contents of this e-mail are privileged and/or confidential to the named > recipient and are not to be used by any other person and/or organisation. > If you have received this e-mail in error, please notify the sender and > delete > all material pertaining to this e-mail. > ______________________________________________ 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.
