Answers for "r dataframe add a column with cumulative values"

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r dataframe add a column with cumulative values

df <- data.frame(id = rep(1:3, each = 5)
                 , hour = rep(1:5, 3)
                 , value = sample(1:15))
                 
df %>% group_by(id) %>% mutate(csum = cumsum(value))

Posted by: Guest on May-27-2021

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