• Number of elements found in a matrix row or in a matrix column
• Managing the errors
WINDEV
WEBDEV
WINDEV Mobile
Others
StatVariance (Function)
In french: StatVariance
Calculates the variance for a series of values.
Remark: This calculation is performed on a sample of values. To calculate the variance for a full series of values, use StatVarianceP.
// Calculate the variance of the elements in row 3
ResVariance = StatVariance("MyMatrix", 3, False)
Syntax
<Result> = StatVariance(<Matrix> [, <Row/Column number> [, <Row/Column>]])
<Result>: Real
Variance for a series of values.
<Matrix>: Character string (with quotes)
Name of the matrix containing the data, defined by MatCreate.
<Row/Column number>: Optional integer
Number of the row or column containing the data (1 by default).
<Row/Column>: Optional boolean
• True (by default) if the series of values corresponds to a matrix column,
• False if the series of values corresponds to a matrix row.
Remarks

Number of elements found in a matrix row or in a matrix column

The number of elements found in a matrix row or in a matrix column is taken as a reference. This number of elements corresponds to:
• the total number of matrix rows, returned by MatNbLine (if the calculation is performed on a column),
• the total number of matrix columns, returned by MatNbColumn (if the calculation is performed on a row).
If the series contain less elements than the matrix, the missing values are automatically filled with 0. These values are taken into account during the calculations.

Managing the errors

Caution: StatVariance returns no error code. To find out whether errors have been generated when calculating the variance, use StatError. To find out the error details, use ErrorInfo associated with the errMessage constant.
Related Examples:
 Unit examples (WINDEV): The Stat functions [ + ] Using the main functions for statistical calculations (using matrices):- Calculate a sum of values- Calculate a mean of values- Find the minimum value in a set of values- Find the maximum value in a set of values
Business / UI classification : Neutral code
Component : wd260mat.dll
Minimum version required
• Version 9