Here's a very "step by step" example with dplyr as I'm trying to teach myself
the Tidyverse way of being
library(dplyr)
# Serial Measurement Meas_test Serial_test
# 1 17 fail fail
# 1 16 pass fail
# 2 12 pass pass
# 2 8 pass pass
# 2 10 pass pass
# 3 19 fail fail
# 3 13 pass pass
dat <- as.data.frame(list(Serial = c(1,1,2,2,2,3,3),
Measurement = c(17, 16, 12, 8, 10, 19, 13),
Meas_test = c("fail", "pass", "pass", "pass", "pass",
"fail", "pass")))
dat %>%
group_by(Serial) %>%
summarise(Serial_test = sum(Meas_test == "fail")) %>%
mutate(Serial_test = if_else(Serial_test > 0, 1, 0),
Serial_test = factor(Serial_test,
levels = 0:1,
labels = c("pass", "fail"))) -> groupedDat
dat %>%
left_join(groupedDat) # add -> dat to the end to pip to dat
Gives:
Serial Measurement Meas_test Serial_test
1 1 17 fail fail
2 1 16 pass fail
3 2 12 pass pass
4 2 8 pass pass
5 2 10 pass pass
6 3 19 fail fail
7 3 13 pass fail
Would be easier for us if used dput() to share your data but thanks for the
minimal example!
Chris
----- Original Message -----
> From: "Ivan Krylov" <krylov.r...@gmail.com>
> To: "Thomas Subia via R-help" <r-help@r-project.org>
> Cc: "Thomas Subia" <tgs...@yahoo.com>
> Sent: Sunday, 22 March, 2020 07:24:15
> Subject: Re: [R] Grouping Question
> On Sat, 21 Mar 2020 20:01:30 -0700
> Thomas Subia via R-help <r-help@r-project.org> wrote:
>
>> Serial_test is a pass, when all of the Meas_test are pass for a given
>> serial. Else Serial_test is a fail.
>
> Use by/tapply in base R or dplyr::group_by if you prefer tidyverse
> packages.
>
> --
> Best regards,
> Ivan
>
> ______________________________________________
> 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.
--
Chris Evans <ch...@psyctc.org> Visiting Professor, University of Sheffield
<chris.ev...@sheffield.ac.uk>
I do some consultation work for the University of Roehampton
<chris.ev...@roehampton.ac.uk> and other places
but <ch...@psyctc.org> remains my main Email address. I have a work web site
at:
https://www.psyctc.org/psyctc/
and a site I manage for CORE and CORE system trust at:
http://www.coresystemtrust.org.uk/
I have "semigrated" to France, see:
https://www.psyctc.org/pelerinage2016/semigrating-to-france/
That page will also take you to my blog which started with earlier joys in
France and Spain!
If you want to book to talk, I am trying to keep that to Thursdays and my diary
is at:
https://www.psyctc.org/pelerinage2016/ceworkdiary/
Beware: French time, generally an hour ahead of UK.
______________________________________________
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.
