Averages/Median: Difference between revisions

=={{header|PowerShell}}==

This function returns an object containing the minimal amount of statistical data,

including Median, and could be modified to take input directly from the pipeline.

All statistical properties could easily be added to the output object.

<lang PowerShell>

function Get-Statistic

{

[CmdletBinding()]

[OutputType([double])]

Param

(

[Parameter(Mandatory=$true, Position=0)]

[ValidateNotNullOrEmpty()]

[double[]]

$Vector

)

$Vector = $Vector | Sort-Object

if ($Vector.Count % 2)

{

$median = $Vector[[Math]::Floor($Vector.Count/2)]

}

else

{

$median = ($Vector[$Vector.Count/2], $Vector[$Vector.Count/2-1] | Measure-Object -Average).Average

}

$Vector |

Measure-Object -Minimum -Maximum -Sum -Average |

Select-Object -Property Count, Minimum, Maximum, Sum, Average |

Add-Member -MemberType NoteProperty -Name Median -Value $median -PassThru

}

</lang>

<lang PowerShell>

Get-Statistic -Vector 5.1, 2.6, 6.4, 8.8, 4.6, 4.1

</lang>

{{Out}}

<pre>

Count : 6

Minimum : 2.6

Maximum : 8.8

Sum : 31.6

Average : 5.26666666666667

Median : 4.85

</pre>

Get the median only

<lang PowerShell>

(Get-Statistic -Vector 5.1, 2.6, 6.4, 8.8, 4.6, 4.1).Median

</lang>

{{Out}}

<pre>

4.85

</pre>

A list with an odd number of values:

<lang PowerShell>

(Get-Statistic -Vector 5.1, 2.6, 8.8, 4.6, 4.1).Median

</lang>

{{Out}}

<pre>

4.6

</pre>