Thanks, I will check it out. Op za 18 jul. 2020 om 00:47 schreef Chris Gordon-Smith < c.gordonsm...@gmail.com>:
> There is an interesting item on stringsAsFactors in this useR! 2020 > session: > > https://www.youtube.com/watch?v=X_eDHNVceCU&feature=youtu.be > > It's about 27 minutes in. > > Chris Gordon-Smith > On 15/07/2020 17:16, Marc Schwartz via R-help wrote: > > On Jul 15, 2020, at 4:31 AM, andy elprama <andy.elpr...@gmail.com> > <andy.elpr...@gmail.com> wrote: > > Dear R-users, > > Something strange happened within the command "levels" > > R version 3.6.1 > name <- c("a","b","c") > values <- c(1,2,3) > data <- data.frame(name,values) > levels(data$name) > [1] "a" "b" "c" > > R version 4.0 > name <- c("a","b","c") > values <- c(1,2,3) > data <- data.frame(name,values) > levels(data$name) > [1] NULL > > What is happening here? > > Hi, > > The default value for 'stringsAsFactors' for data.frame() and read.table() > changed from TRUE to FALSE in version 4.0.0, per the news() file: > > "R now uses a stringsAsFactors = FALSE default, and hence by default no > longer converts strings to factors in calls to data.frame() and read.table()." > > > Using 4.0.2: > > data <- data.frame(name, values, stringsAsFactors = TRUE) > > > levels(data$name) > > [1] "a" "b" "c" > > > If you see behavioral changes from one version of R to another, especially > major version increments, check the news() file. > > Regards, > > Marc Schwartz > > > ______________________________________________r-h...@r-project.org mailing > list -- To UNSUBSCRIBE and more, > seehttps://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. > > [[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.
