Dear useRs, I'm still trying to learn tidyverse syntax. I would like to select() columns based on their positions/indices, but I cannot find a way to do that (I've seen a lot about doing that for rows, but I could not find anything for columns). I thought it would be obvious, but I cannot find it. Basically, I am looking for something like: mydata %>% ? select( vector_of_indices ) I know that the pipe is useless here, but there are more steps in my real code. The helper num_range() works only when headers contains the positions (e.g. "x1, x2..."). Of course, it's easy using "[", but I expected it would be possible with select() as well; it would make the code more readable than: mydata %>% ? .[ vector_of_indices ] Thank you for your help. 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
Did you try it? mydata %>% ? select( c( 1, 2, 4 ) ) On August 20, 2020 1:41:13 AM PDT, Ivan Calandra <calandra at rgzm.de> wrote:>Dear useRs, > >I'm still trying to learn tidyverse syntax. > >I would like to select() columns based on their positions/indices, but >I >cannot find a way to do that (I've seen a lot about doing that for >rows, >but I could not find anything for columns). I thought it would be >obvious, but I cannot find it. > >Basically, I am looking for something like: >mydata %>% >? select( vector_of_indices ) >I know that the pipe is useless here, but there are more steps in my >real code. > >The helper num_range() works only when headers contains the positions >(e.g. "x1, x2..."). > >Of course, it's easy using "[", but I expected it would be possible >with >select() as well; it would make the code more readable than: >mydata %>% >? .[ vector_of_indices ] > >Thank you for your help. >Ivan-- Sent from my phone. Please excuse my brevity.
OK, my bad... I'm sure I had tried it and it didn't work, but I guess the error was somewhere else... 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 On 20/08/2020 11:03, Jeff Newmiller wrote:> Did you try it? > > mydata %>% > ? select( c( 1, 2, 4 ) ) > > On August 20, 2020 1:41:13 AM PDT, Ivan Calandra <calandra at rgzm.de> wrote: >> Dear useRs, >> >> I'm still trying to learn tidyverse syntax. >> >> I would like to select() columns based on their positions/indices, but >> I >> cannot find a way to do that (I've seen a lot about doing that for >> rows, >> but I could not find anything for columns). I thought it would be >> obvious, but I cannot find it. >> >> Basically, I am looking for something like: >> mydata %>% >> ? select( vector_of_indices ) >> I know that the pipe is useless here, but there are more steps in my >> real code. >> >> The helper num_range() works only when headers contains the positions >> (e.g. "x1, x2..."). >> >> Of course, it's easy using "[", but I expected it would be possible >> with >> select() as well; it would make the code more readable than: >> mydata %>% >> ? .[ vector_of_indices ] >> >> Thank you for your help. >> Ivan