Duncan I need to plot the results (ggplot2) and I'm thinking I can only use a data.frame object in ggplot2. It is a rath r large "list" over 1 million rows. It is possible to work with a matrix in ggplot2?
Jeff -----Original Message----- From: Duncan Murdoch <murdoch.dun...@gmail.com> Sent: Saturday, July 24, 2021 12:03 PM To: reichm...@sbcglobal.net; R-help@r-project.org Subject: Re: [R] Converting a list to a data frame Others have shown you how to extract the matrix and convert it to a dataframe. My only addition is to suggest that you don't do this: matrix methods are often much more efficient than dataframe methods, so if you can work with the matrix without conversion, you'll often find things run a lot faster. Duncan Murdoch On 24/07/2021 9:18 a.m., Jeff Reichman wrote: > How does one convert a list into a data frame? > > > >> str(weight_chains) > > List of 1 > > $ : 'mcmc' num [1:100000, 1:3] -105 -105 -105 -104 -103 ... > > ..- attr(*, "dimnames")=List of 2 > > .. ..$ : NULL > > .. ..$ : chr [1:3] "a" "b" "s" > > ..- attr(*, "mcpar")= num [1:3] 1001 101000 1 > > - attr(*, "class")= chr "mcmc.list" > > > > Such that .. > > > >> > > weight_chains > > > > a b s > > 1 -104.72512 1.0141407 9.369227 > > 2 -104.52297 1.0167432 9.131354 > > 3 -104.72669 1.0139528 9.219877 > > > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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 -- To UNSUBSCRIBE and more, see 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.
