Strange. Worked fine on:
R version 3.4.2 (2017-09-28)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Debian GNU/Linux 9 (stretch)
Commands:
m <- data.frame( id = rep(1:3, each=2), score = rep(c(6,3), each=3) )
as.data.frame(m %>% group_by(id) %>% mutate(total = cumsum(score)))
id score total
1 1 6 6
2 1 6 12
3 2 6 6
4 2 3 9
5 3 3 3
6 3 3 6
-----Original Message-----
From: R-help <r-help-boun...@r-project.org> On Behalf Of Sumitrajit Dhar
Sent: Monday, July 9, 2018 5:35 PM
To: r-help@r-project.org
Subject: [R] Something simple not working in group_by
Hi Folks,
I am trying to get a group_by cumsum using:
R version 3.5.0 (2018-04-23) -- "Joy in Playing"
Copyright (C) 2018 The R Foundation for Statistical Computing
Platform: x86_64-apple-darwin15.6.0 (64-bit)
Here is an example of a simple construct that is not working.
m <- data.frame( id = rep(1:3, each=2), score = rep(c(6,3), each=3) )
m %>% group_by(id) %>% mutate(total = cumsum(score))
My output:
# A tibble: 6 x 3
# Groups: id [3]
id score total
<int> <dbl> <dbl>
1 1 6 6
2 1 6 12
3 2 6 18
4 2 3 21
5 3 3 24
6 3 3 27
What am I missing? Thanks in advance.
Regards,
Sumit
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