Measure-Object

Updated: August 9, 2015

Measure-Object

Calculates the numeric properties of objects, and the characters, words, and lines in string objects, such as files of text.

Aliases

The following abbreviations are aliases for this cmdlet: 

  • measure

Syntax

Parameter Set: GenericMeasure
Measure-Object [[-Property] <String[]> ] [-Average] [-InputObject <PSObject> ] [-Maximum] [-Minimum] [-Sum] [ <CommonParameters>]

Parameter Set: TextMeasure
Measure-Object [[-Property] <String[]> ] [-Character] [-IgnoreWhiteSpace] [-InputObject <PSObject> ] [-Line] [-Word] [ <CommonParameters>]




Detailed Description

The Measure-Object cmdlet calculates the property values of certain types of object. Measure-Object performs three types of measurements, depending on the parameters in the command.

The Measure-Object cmdlet performs calculations on the property values of objects. It can count objects and calculate the minimum, maximum, sum, and average of the numeric values. For text objects, it can count and calculate the number of lines, words, and characters.

Parameters

-Average

Indicates that the cmdlet displays the average value of the specified properties.


Aliases

none

Required?

false

Position?

named

Default Value

none

Accept Pipeline Input?

false

Accept Wildcard Characters?

false

-Character

Indicates that the cmdlet counts the number of characters in the input object.


Aliases

none

Required?

false

Position?

named

Default Value

none

Accept Pipeline Input?

false

Accept Wildcard Characters?

false

-IgnoreWhiteSpace

Indicates that the cmdlet ignores white space in word counts and character counts. By default, white space is not ignored.


Aliases

none

Required?

false

Position?

named

Default Value

none

Accept Pipeline Input?

false

Accept Wildcard Characters?

false

-InputObject<PSObject>

Specifies the objects to be measured. Enter a variable that contains the objects, or type a command or expression that gets the objects.

When you use the InputObject parameter with Measure-Object, instead of piping command results to Measure-Object, the InputObject value—even if the value is a collection that is the result of a command, such as –InputObject (Get-Process)—is treated as a single object. Because InputObject cannot return individual properties from an array or collection of objects, it is recommended that if you use Measure-Object to measure a collection of objects for those objects that have specific values in defined properties, you use Measure-Object in the pipeline, as shown in the examples in this topic.


Aliases

none

Required?

false

Position?

named

Default Value

none

Accept Pipeline Input?

true (ByValue)

Accept Wildcard Characters?

false

-Line

Indicates that the cmdlet counts the number of lines in the input object.


Aliases

none

Required?

false

Position?

named

Default Value

none

Accept Pipeline Input?

false

Accept Wildcard Characters?

false

-Maximum

Indicates that the cmdlet displays the maximum value of the specified properties.


Aliases

none

Required?

false

Position?

named

Default Value

none

Accept Pipeline Input?

false

Accept Wildcard Characters?

false

-Minimum

Indicates that the cmdlet displays the minimum value of the specified properties.


Aliases

none

Required?

false

Position?

named

Default Value

none

Accept Pipeline Input?

false

Accept Wildcard Characters?

false

-Property<String[]>

Specifies one or more numeric properties to measure. The default is the Count property of the object.


Aliases

none

Required?

false

Position?

1

Default Value

none

Accept Pipeline Input?

false

Accept Wildcard Characters?

false

-Sum

Indicates that the cmdlet displays the sum of the values of the specified properties.


Aliases

none

Required?

false

Position?

named

Default Value

none

Accept Pipeline Input?

false

Accept Wildcard Characters?

false

-Word

Indicates that the cmdlet counts the number of words in the input object.


Aliases

none

Required?

false

Position?

named

Default Value

none

Accept Pipeline Input?

false

Accept Wildcard Characters?

false

<CommonParameters>

This cmdlet supports the common parameters: -Debug, -ErrorAction, -ErrorVariable, -InformationAction, -InformationVariable, -OutVariable, -OutBuffer, -PipelineVariable, -Verbose, -WarningAction, and -WarningVariable. For more information, see    about_CommonParameters.

Inputs

The input type is the type of the objects that you can pipe to the cmdlet.

  • System.Management.Automation.PSObject

    You can pipe objects to Measure-Object.


Outputs

The output type is the type of the objects that the cmdlet emits.

  • Microsoft.PowerShell.Commands.GenericMeasureInfo, Microsoft.PowerShell.Commands.TextMeasureInfo, Microsoft.PowerShell.Commands.GenericObjectMeasureInfo

    If you use the Word parameter, Measure-Object returns a TextMeasureInfo object. Otherwise, it returns a GenericMeasureInfo object.


Examples

Example 1: Count the files and folders in a directory

This command counts the files and folders in the current directory.


PS C:\> Get-ChildItem | Measure-Object

Example 2: Measure the files in a directory

This command displays the minimum, maximum, and sum of the sizes of all files in the current directory, and the average size of a file in the directory.


PS C:\> Get-ChildItem | Measure-Object -Property length -Minimum -Maximum -Average

Example 3: Measure text in a text file

This command displays the number of characters, words, and lines in the Text.txt file.


PS C:\> Get-Content C:\test.txt | Measure-Object -Character -Line -Word

Example 4: Measure computer processes

This command displays the minimum, maximum, and average sizes of the working sets of the processes on the computer.


PS C:\> Get-Process | Measure-Object -Property workingset -Minimum -Maximum -Average

Example 5: Measure the contents of a CSV file

This command calculates the average years of service of the employees of a company.

The ServiceYrs.csv file is a CSV file that contains the employee number and years of service of each employee. The first row in the table is a header row of EmpNo, Years.

When you use Import-Csv to import the file, the result is a PSCustomObject with note properties of EmpNo and Years. You can use Measure-Object to calculate the values of these properties, just like any other property of an object.


PS C:\> Import-Csv d:\test\serviceyrs.csv | Measure-Object -Property years -Minimum -Maximum -Average

Example 6: Measure Boolean values

This example demonstrates how the Measure-Object can measure Boolean values. In this case, it uses the PSIsContainer Boolean property to measure the incidence of folders (vs. files) in the current directory.


PS C:\> Get-ChildItem | Measure-Object -Property psiscontainer -Max -Sum -Min -Average

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