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use summarize multiple columns r

Trustworthy Whale on Jun 09, 2021

library(dplyr)

df %>% group_by(grp) %>% summarise(across(everything(), list(mean)))
#> # A tibble: 3 x 5
#>     grp     a     b     c     d
#>   <int> <dbl> <dbl> <dbl> <dbl>
#> 1     1  3.08  2.98  2.98  2.91
#> 2     2  3.03  3.04  2.97  2.87
#> 3     3  2.85  2.95  2.95  3.06

Source: stackoverflow.com

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r sum based on two columns

Powerful Petrel on Jul 27, 2020

aggregate(x$Frequency, by=list(Category=x$Category), FUN=sum)
  Category  x
1    First 30
2   Second  5
3    Third 34

Source: stackoverflow.com

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"use summarize multiple columns r" Code Answer's