GAP:FrequencySort

This article is about a GAP function.

This GAP function is not in-built: you need to copy the code on this page to define the function.

Definition

Function type

This function takes as input a list, and outputs the list of frequencies of various items in the list.

Method

Code

FrequencySort := function(L)
        local S;
        S := Set(AsSortedList(L));
        return(List(S,x -> [x,Length(Filtered(L,y -> y = x))]));
end;;

Paste this code in front of the GAP prompt or copy it to a file and read the file from the GAP prompt.