stats (replaces TStats)

The stats function computes the mean, standard deviation, and other basic statistics for numeric data and returns them in an indexed table. The parameters may be a CImage, CMatrix, or CArray object, a 1-dimensional array, or a list of numbers. The array and list parameters must contain a mixture of numbers and strings that can be converted to numbers.

Syntax

tbl = stats( CImage )

tbl = stats( CImage, CRect )

tbl = stats( CMatrix )

tbl = stats( CArray )

tbl = stats( table )

tbl = stats( num1, num2, num3, ... )

    The returned value tbl is an indexed table containing the following 8 values:

      tbl[1] is the mean value returned in table index 1.

      tbl[2] is the median value returned in table index 2.

      tbl[3] is the standard deviation returned in table index 3.

      tbl[4] is the minimum value returned in table index 4.

      tbl[5] is the maximum value returned in table index 5.

      tbl[6] is the statistical skewness returned in table index 6.

      tbl[7] is the statistical kurtosis returned in table index 7.

      tbl[8] is the number of values in the sample returned in table index 8.

    On success, tbl is returned.

    On failure, nil is returned.

Example

Suppose a CImage I exists. The following script returns the mean and standard deviation of 600 pixels in the corner of the image:

Related Topics

Table and Array Functions, CStats class, CStats:Stats, CImage class, CRect class, mean, sdev

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