Hello!
I have a vector 'grades' and a data frame 'info':
grades2 <- data.frame(grade = c(1,2,2,3,1))
info <- data.frame(
grade = 3:1,
desc = c("Excellent", "Good", "Poor"),
fail = c(F, F, T)
)
I want to get the info for all grades I have in info:
This solution resorts everything in the order of column 'grade':
merge(grades2, info, by = "grade", all.x = T, all.y = F)
Could you please explain why this solution also resorts - despite sort = FALSE?
merge(grades2, info, by = "grade", all.x = T, all.y = F, sort = FALSE)
Thanks a lot!
--
Dimitri Liakhovitski
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