In order to calculate an average for a list of numbers, file sizes, durations, or range of numbers, or a table with columns containing numeric values you can use the math avg command.
This command is part of the math module of Nushell.
When the input is a list then the result is a single value with the average of all values in the list.
If you use a table as input the result is a record where the key is the column name and the value the average of all values in that column.
Finally it is possible to have a single value as input and the result is the same value obviously.
The following example has several uses of the math avg command:
use std/assert
# Using math avg on a list of numbers.
assert equal ([1 2 3] | math avg) 2
# math avg also works on a single value
# and returns simply the value.
assert equal (1 | math avg) 1
# Using math avg on a range of numbers.
assert equal (5..10 | math avg) 7.5
# Using math avg on a list of durations.
assert equal ([1min 15sec 1.5min] | math avg) 55sec
# math avg also works on a single value
# and returns simply the value.
assert equal (1min | math avg) 1min
# Using math avg on a list of sizes.
assert equal ([200MB 100MB 0.6GB] | math avg) 300MB
# math avg also works on a single value
# and returns simply the value.
assert equal (100MB | math avg) 100MB
# Helper table with columns name, age, height (in cm).
let table = [
[name age height];
[Alice 30 175]
[Bob 25 185]
[Charlie 35 180]
]
# Using math avg on a table result in a record with for each
# numeric column the avg of all values.
assert equal ($table | math avg) { age: 30 height: 180 }
Written with Nushell 0.109.1.
