STATS SPL Directory

The Stats directory contains SPL functions for statistical analysis. The following functions are included:

A2STD	Converts an alpha confidence level to a standard deviation range.
CNF2STD	Converts a confidence level (%) to a standard deviation range.
CONFX	Returns confidence level for a given density function and X value.
ENFCINV	Returns the inverse incomplete error function.
ENFINV	Returns the inverse error function.
GAMMAINC	Returns the incomplete gamma function.
KURTOSIS	Calculates the kurtosis of a series.
PDFNORM	Returns the probability density function for a normal distribution.
PEARSON	Calculates Pearson's Linear Correlation Coefficient.
PERCENTILE	Estimates the percentile of a series.
PROBN	Returns the probability of X <= z for a normal distribution.
SKEW	Calculates the skewness of a series.
STDERR	Calculates the standard error of a series or table.
SVD	Calculates the singular value decomposition of an array.
SVDDIV	Solves for x in A *^ x = b using singular value decomposition.
TREND	Fits a line to a series.
XCONF	Returns x value for a given density function and confidence level.