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Comment: Published by Scroll Versions from space DEV and version r0762

D toc

Excerpt

Generates the variance 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 current sample. 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
area stat_sampling

For more information on how the platform calculates variance, see VAR Function.

D s lang vs sql

D s
snippet Basic

D lang syntax
RawWrangle true ref true pivot value: varif(testScores, ((testScores > 0) && (testScores < 90)) group:studentId limit:1

varsampif(testScores, ((testScores > 0) && (testScores < 90)))

Output: Returns the variance of the `testScores` column when the `testScores` value is between 0 and 90 using the sample method of calculation.

D s
snippet Syntax

D lang syntax
RawWrangle true syntax true pivot value:varif(col_ref, test_expression) [group:group_col_ref] [limit:limit_count]

varsampif(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
snippet usage

Required?Data TypeExample Value
YesString that corresponds to the name of the column`myValues`

### test_expression

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

D s
snippet usage

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

D s
snippet Examples

### Example - Conditional Calculation Functions

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

D s also
label aggregate