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tallies the elements in list, listing all distinct elements together with their multiplicities.
uses test to determine whether pairs of elements should be considered equivalent, and gives a list of the first representatives of each equivalence class, together with their multiplicities.
- Tally[list] lists distinct elements in the order they appear in list.
- Tally[list] is equivalent to Tally[list,SameQ].
Examplesopen allclose all
Basic Examples (2)
Obtain tallies for a list of symbols:
Count the elements of a list having the same head:
Results are returned in order of first occurrence in the list:
Count the instances of randomly generated integers:
Elements of the list can be any expression:
Count occurrences of characters in a string:
Properties & Relations (5)
Elements with highest frequencies are given by Commonest:
A sorted Tally is equivalent to a list of counts for the Union:
Tally is a discrete analog of BinCounts:
Counts[list] returns an association in which values are the tallies of their keys:
Use the second argument of Tally to construct its corresponding by-function:
Count odd and even numbers in a list: