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Comment: Published by Scroll Versions from space DEV and version r0810

D toc

Excerpt

Computes the standard deviation across all column values of Integer or Decimal type.

The standard deviation of a set of values attempts to measure the spread in values around the mean and is used to measure confidence in statistical results. A standard deviation of zero means that all values are the same, and a small standard deviation means that the values are closely bunched together. A high value for standard deviation indicates that the numbers are spread out widely. Standard deviation is always a positive value.

  • If a row contains a missing or null value, it is not factored into the calculation. 
  • If no numeric values are detected in the input column, the function returns 0.

D s terms
areastat_sampling

  • This function is calculated across the entire population.

  • For more information on a sampled version of this function, see STDEVSAMP Function.

The square of standard deviation is variance. See VAR Function.

For a version of this function computed over a rolling window of rows, see ROLLINGSTDEV Function.

D s lang vs sql

D s
snippetBasic

D lang syntax
RawWrangletrue
Typeref
showNotetrue
WrangleTextpivot value:stdev(myRating) group: postal_code limit:1

stdev(myRating)

Output: Returns the standard deviation of the values from the myRating column.

D s
snippetSyntax

D lang syntax
RawWrangletrue
Typesyntax
showNotetrue
WrangleTextpivot value:stdev(function_col_ref) [group:group_col_ref] [limit:limit_count]

stdev(function_col_ref) [group:group_col_ref] [limit:limit_count]


ArgumentRequired?Data TypeDescription
function_col_refYstringName of column to which to apply the function

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

D s lang notes

function_col_ref

Name of the column the values of which you want to calculate the variance. Column must contain Integer or Decimal values.

  • Literal values are not supported as inputs.
  • Multiple columns and wildcards are not supported.

D s
snippetusage

Required?Data TypeExample Value
YesString (column reference)myValues


D s
snippetExamples

Include Page
EXAMPLE - Statistical Functions
EXAMPLE - Statistical Functions

D s also
labelaggregate