/R/Add column value based on row index r

Add column value based on row index r

# We can use row_number() function in dplyr 
# We will test if the row is present in your vector and assign the value accordingly

library(dplyr)
sig = c(5, 10, 20)

genes %>%
mutate(Sig = ifelse(row_number() %in% sig, "YES", "NO"))

Source: stackoverflow.com

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