I frequently have a list of numbers and what I want is a sorted list of unique elements with a count of how many times each element appears. Is there some way to do this with ListTools?
Here is my code:
listhist := proc(L)
local S, T, i;
T := table(sparse):
for i in L do T[i] := T[i]+1; end do;
S := sort(map(op,[indices(T)]));