Question

I have a data frame called y

dput(y)
structure(list(val1 = c(25L, 615L, 30L, 76L, 97L, 211L, 0L, 40L, 
10L, 10L), val2 = c(101L, 286L, 124L, 77L, 176L, 120L, 0L, 8L, 
56L, 49L), val3 = c(157L, 454L, 106L, 242L, 144L, 31L, 0L, 40L, 
45L, 57L)), .Names = c("val1", "val2", "val3"), row.names = c(NA, 
10L), class = "data.frame")

I would like to be able to look at val1 and val2 columns and if val1>10, replace the value with TRUE else FALSE and look at val2 and if val2<5, replace the value with TRUE else FALSE

I can use subset function to pick them but rather than using subset, I like to replace values with TRUE or FALSE, any ideas how I would do this?

Answer 1

Just use boolean operators:

y$val1 > 10 | (y$val1 <=10 & y$val2<5)
# [1]  TRUE  TRUE  TRUE  TRUE  TRUE  TRUE  TRUE  TRUE FALSE FALSE