?summarise_all
See the examples.
On March 3, 2019 7:14:55 PM PST, p...@philipsmith.ca wrote:
>I have a data frame in which the first column is a sequence of monthly
>dates and the other columns are variables. There are a great many
>variables. I want to create another data frame similar to the first
>one,
>but with annual values instead of monthly, created by summing the
>months
>within each year.
>
>I am able to do this as shown in this reprex:
>
>library(tidyverse)
>REF_DATE <- seq(as.Date("2000/1/1"),by="month",length.out=36)
>set.seed(57)
>df <- data.frame(REF_DATE,
> x=sample(1:100,size=36),
> y=sample(1:100,size=36),
> z=sample(1:100,size=36),
> Year=year(REF_DATE))
>df1 <- df %>%
> group_by(Year) %>%
> summarise(x_a=sum(x),y_a=sum(y),z_a=sum(z)) %>%
> ungroup()
>
>However, while this works for the simple case with only three
>variables,
>I actually have many more than three, so I am looking for a more
>general
>approach. I have no clue as to how to proceed. Any advice will be much
>appreciated.
>
>Philip
>
>______________________________________________
>R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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>PLEASE do read the posting guide
>http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.
--
Sent from my phone. Please excuse my brevity.
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
