Grouping and measuring

Group-Object is a powerful command that allows you to group objects together based on similar values.

Measure-Object supports a number of simple mathematical operations, such as counting the number of objects, calculating an average, calculating a sum, and so on. It also allows characters, words, or lines to be counted in text fields.

The Group-Object command

The Group-Object command shows a group and count for each occurrence of a value in a collection of objects.

Given the sequence of numbers shown, Group-Object creates a Name that holds the value it is grouping, a Count as the number of occurrences of that value, and a Group as the set of similar values:

PS> 6, 7, 7, 8, 8, 8 | Group-Object

Count...