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 7, Windows Vista SP2, Windows XP SP3, Windows XP x64 SP2, Windows Server 2008 R2, Windows Server 2008 SP2, Windows Server 2003 SP2
Supported in: 2.0, 4.0
Supported in: 3