List.averageBy<'T,^U> Function (F#)
Returns the average of the elements generated by applying the function to each element of the list.
Namespace/Module Path: Microsoft.FSharp.Collections.List
Assembly: FSharp.Core (in FSharp.Core.dll)
List.averageBy : ('T -> ^U) -> 'T list -> ^U (requires ^U with static member (+) and ^U with static member DivideByInt and ^U with static member Zero)
List.averageBy projection list
'T -> ^U
The function to transform the list elements into the type to be averaged.
The input list.
This function is named
AverageBy in compiled assemblies. If you are accessing the member from a language other than F#, or through reflection, use this name.
The following code example illustrates the use of
let avg2 = List.averageBy ( fun elem -> float elem) [1 .. 10]
printfn "%f" avg2
Windows 8, Windows 7, Windows Server 2012, Windows Server 2008 R2
F# Core Library Versions
Supported in: 2.0, 4.0, Portable