• Number of elements found in a matrix row or in a matrix column
• Managing errors
WINDEV
WEBDEV
WINDEV Mobile
Others
StatStandardDeviationP (Function)
In french: StatEcartTypeP
Calculates the standard deviation for a full series of values.
Reminder: The standard deviation gives the dispersion of values in relation to the average value.
Remark: StatStandardDeviationP assumes that the arguments represent the entire population. To calculate the standard deviation for a sample of population, use StatStandardDeviation. With large-size samples, StatStandardDeviationP and StatStandardDeviation approximatively return the same value.
// Calculate the standard deviation of the elements in row 1 of a matrix
ResStandardDeviationP = StatStandardDeviationP("MyMatrix", 1, False)
Syntax
<Result> = StatStandardDeviationP(<Matrix> [, <Row/Column number> [, <Row/Column>]])
<Result>: Real
• Standard deviation of values,
• 0 if the standard deviation is null.
<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 errors

Caution: StatStandardDeviationP returns no error code. To find out whether errors have been generated when calculating the standard deviation, 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 : wd250mat.dll
Minimum version required
• Version 9