Dear Chris, I didn't think about having the assignment at the end as you showed; it indeed fits the pipe workflow better.
By "easy", I actually meant shorter. As you said, in base R, I usually do that in 1 line, so I was hoping to do the same in tidyverse. But I'm glad to hear that I'm using tidyverse the proper way :) Best regards, Ivan -- Dr. Ivan Calandra TraCEr, laboratory for Traceology and Controlled Experiments MONREPOS Archaeological Research Centre and Museum for Human Behavioural Evolution Schloss Monrepos 56567 Neuwied, Germany +49 (0) 2631 9772-243 https://www.researchgate.net/profile/Ivan_Calandra On 19/08/2020 19:21, Chris Evans wrote: > Inline > > ----- Original Message ----- >> From: "Ivan Calandra" <calan...@rgzm.de> >> To: "R-help" <r-help@r-project.org> >> Sent: Wednesday, 19 August, 2020 16:56:32 >> Subject: [R] combine filter() and select() >> Dear useRs, >> >> I'm new to the tidyverse world and I need some help on basic things. >> >> I have the following tibble: >> mytbl <- structure(list(files = c("a", "b", "c", "d", "e", "f"), prop = >> 1:6), row.names = c(NA, -6L), class = c("tbl_df", "tbl", "data.frame")) >> >> I want to subset the rows with "a" in the column "files", and keep only >> that column. >> >> So I did: >> myfile <- mytbl %>% >> filter(grepl("a", files)) %>% >> select(files) >> >> It works, but I believe there must be an easier way to combine filter() >> and select(), right? > I would write > > mytbl %>% > filter(grepl("a", files)) %>% > select(files) -> myfile > > as I like to keep a sort of "top to bottom and left to right" flow when > writing in the tidyverse dialect of R but that's really not important. > > Apart from that I think what you've done is "proper tidyverse". To me another > difference between the dialects is that classical R often seems to put value > on, and make it easy, to do things with incredible few characters. I think > the people who are brilliant at that sort of coding, and there are many on > this list, that sort of coding is also easy to read. I know that Chinese is > easy to read if you grew up on it but to a bear of little brain like me, the > much more verbose style of tidyverse repays typing time with readability when > I come back to my code and, though I have little experience of this yet, when > I read other poeple's code. > > What did you think wasn't "easy" about what you wrote? > > Very best (all), > > Chris > >> Thank you! >> Ivan >> >> -- >> Dr. Ivan Calandra >> TraCEr, laboratory for Traceology and Controlled Experiments >> MONREPOS Archaeological Research Centre and >> Museum for Human Behavioural Evolution >> Schloss Monrepos >> 56567 Neuwied, Germany >> +49 (0) 2631 9772-243 >> https://www.researchgate.net/profile/Ivan_Calandra >> >> ______________________________________________ >> 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.
