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Questions - rollapply

How to flag the values of a column based on values of another column in R by using rollapply?

I have a data frame, like this: df <- data.frame (T = c(1:20), L = c(1,2,9,4,6,8,3,4,2,5,2,5,9,10,3,5,1,1,2,2)) I want to Flag a T value Ti (and also Ti−1 and Ti+1) if Li is bigger than 6 (i.e. ...
test-img

Faranak omidi

r

dplyr

zoo

rollapply

Votes: 0

Answers: 2

Latest Answer

Using rollapply - library(dplyr) library(zoo) df %>% mutate(flag = rollapply(L > 6, 3, any, fill = FALSE)) # T L flag #1 1 1 FALSE #2 2 2 TRUE #3 3 9 TRUE #4 4 4 TRUE #5 ...
test-img

Ronak Shah

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