Majority vote in R

Question

I need to calculate the majority vote for an item in R and I don\'t have a clue how to approach this.

I have a data frame with items and assigned categories. What I

Answer 1

If you have a function to calculate the mode, as in package prettyR, you can use aggregate:

require(prettyR)

aggregate(d$category, by=list(item=d$item), FUN=Mode)
#  item x
#1    1 2
#2    2 1