Specs

mean(Enum.t()) :: number()

Calculates the mean of a collection of numbers.

This is the sum, divided by the amount of elements in the collection.

If the collection is empty, returns nil

Also see Math.Enum.median/1

Examples

iex> Math.Enum.mean [1,2,3]
2.0
iex> Math.Enum.mean 1..10
5.5
iex> Math.Enum.mean [1,2,3,4,5, -100]
-14.166666666666666
iex> Math.Enum.mean []
nil

Specs

median(Enum.t()) :: number() | nil

Calculates the median of a given collection of numbers.

• If the collection has an odd number of elements, this will be the middle-most element of the (sorted) collection.
• If the collection has an even number of elements, this will be mean of the middle-most two elements of the (sorted) collection.

If the collection is empty, returns nil

Also see Math.Enum.mean/1

Examples

iex> Math.Enum.median [1,2,3]
2
iex> Math.Enum.median 1..10
5.5
iex> Math.Enum.median [1,2,3,4,5, -100]
2.5
iex> Math.Enum.median [1,2]
1.5
iex> Math.Enum.median []
nil

Specs

mode(Enum.t()) :: Enum.t()

Calculates the mode of a given collection of numbers.

Always returns a list. An empty input results in an empty list. Supports bimodal/multimodal collections by returning a list with multiple values.

Examples

iex> Math.Enum.mode [1, 2, 3, 4, 1]
[1]
iex> Math.Enum.mode [1, 2, 3, 2, 3]
[2, 3]
iex> Math.Enum.mode []
[]

Calculates the product, obtained by multiplying all elements in collection with eachother.

Examples

iex> Math.Enum.product [1,2,3]
6
iex> Math.Enum.product 1..10
3628800
iex> Math.Enum.product [1,2,3,4,5, -100]
-12000

Specs

stdev(Enum.t()) :: number() | nil

Calculates the standard deviation of a given collection of numbers.

If the collection is empty, returns nil

Examples

iex> Math.Enum.stdev([1,2,3,4,5])
1.4142135623730951
iex> Math.Enum.stdev 1..10
2.8722813232690143
iex> Math.Enum.stdev [1,2,3,4,5,-100] 
38.407536876098796
iex> Math.Enum.stdev []              
nil

Specs

variance(Enum.t()) :: number() | nil

Calculates the variance of a given collection of numbers.

If the collection is empty, returns nil

Examples

iex> Math.Enum.variance [1, 2, 3, 4, 5]
2.0
iex> Math.Enum.variance 1..10
8.25
iex> Math.Enum.variance [1, 2, 3, 4, 5, -100]
1475.138888888889
iex> Math.Enum.variance []
nil