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D toc

Excerpt

Generates the standard deviation of values by group in a column that meet a specific condition using the sample statistical method.

Info

NOTE: When added to a transform, this function is applied to the sample in the data grid. If you change your sample or run the job, the computed values for this function are updated. Transforms that change the number of rows in subsequent recipe steps do not affect the values computed for this step.

Info

NOTE: This function applies to a sample of the entire population. More information is below.

D s terms
areastat_sampling

  • This function is calculated across a sample of all values.

  • For more information on a population version of this function, see STDEVIF Function.

D s lang vs sql

D s
snippetBasic

D lang syntax
RawWrangletrue
Typeref
showNotetrue
WrangleTextpivot value: stdevif(testScores, testScores > 0) group:studentId limit:1

stdevsampif(testScores, testScores > 0)

Output: Returns the standard deviation of the testScores column when the testScores value is greater than 0.

D s
snippetSyntax

D lang syntax
RawWrangletrue
Typesyntax
showNotetrue
WrangleTextpivot value:stdevif(col_ref, test_expression) [group:group_col_ref] [limit:limit_count]

stdevsampif(col_ref, test_expression) [group:group_col_ref] [limit:limit_count]


ArgumentRequired?Data TypeDescription
col_refYstringReference to the column you wish to evaluate.
test_expressionYstringExpression that is evaluated. Must resolve to true or false

D s lang notes

For more information on the group and limit parameters, see Pivot Transform.

col_ref

Name of the column whose values you wish to use in the calculation. Column must be a numeric (Integer or Decimal) type.

D s
snippetusage

Required?Data TypeExample Value
YesString that corresponds to the name of the columnmyValues

test_expression

This parameter contains the expression to evaluate. This expression must resolve to a Boolean (true or false) value.

D s
snippetusage

Required?Data TypeExample Value
YesString expression that evaluates to true or false(LastName == 'Mouse' && FirstName == 'Mickey')


D s
snippetExamples

Example - Conditional Calculation Functions

Include Page
EXAMPLE - Statistical Functions Sample Method
EXAMPLE - Statistical Functions Sample Method

D s also
labelaggregate