Dear group,
Is there a way I could avoid the sort of duplication illustrated below?
i.e., I have the same dplyr::summarise function on different group_by
arguments. So I'd like to create a single summarise function that could be
applied to both. My attempt below fails.
df <- data.frame(matrix(rnorm(40), 10, 4),
f1 = gl(3, 10, labels = letters[1:3]),
f2 = gl(3, 10, labels = letters[4:6]))
df %>%
group_by(f1, f2) %>%
summarise(x1m = mean(X1),
x2m = mean(X2),
x3m = mean(X3),
x4m = mean(X4))
df %>%
group_by(f1) %>%
summarise(x1m = mean(X1),
x2m = mean(X2),
x3m = mean(X3),
x4m = mean(X4))
# My fail attempt
s <- function() {
dplyr::summarise(x1m = mean(X1),
x2m = mean(X2),
x3m = mean(X3),
x4m = mean(X4))
}
df %>%
group_by(f1) %>% s
Error in s(.) : unused argument (.)
Regards,
Lars.
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