mean

Synopsis

mean()

Table 1. Legend
Syntax conventions	Description
Lowercase and uppercase	Literal keyword. Includes `()`.
`Italics`	Variable value. Replace with a user-defined value.
`[]`	Optional. Square brackets ( `[]` ) surround optional command arguments. Do not type the square brackets.
`{}`	Group. Braces ( `{}` ) identify a group to choose from. Do not type the braces.
`\|`	Or. A vertical bar ( `\|` ) separates alternative elements. Type any one of the elements. Do not type the vertical bar.
`...`	Repeatable. An ellipsis ( `...` ) indicates that you can repeat the syntax element as often as required.

Description

The mean() step is a map step that will discover the mean average of the numbers generated from the previous step in the traversal.

Examples

Find the mean average of the stars for reviews for each reviewer:

g.V().hasLabel('person').as('person','starCount').
  select('person','starCount').
    by('name').
    by(outE('reviewed').values('stars').mean()).
  order().by(select('starCount'), decr)

Find the mean average of the number of ingredients for each recipe:

g.V().hasLabel('recipe').
  map(inE('includedIn').count()).
    mean()