Message-ID: <56a4b63b-2811-6fd4-b8d1-9feee902da8d@rgzm.de>
Date: 2020-08-20T09:05:48Z
From: Ivan Calandra
Subject: select() columns using their positions
In-Reply-To: <42CC184F-A8B1-4B04-B227-8440533D92E8@dcn.davis.ca.us>
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