Walter Szeliga > Statistics-Robust-0.01 > Statistics::Robust::Scale

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Source   Latest Release: Statistics-Robust-0.02

NAME ^

Statistics::Robust::Scale - Robust Measures of Scale

SYNOPSIS ^

 my @x = (1,4,5,3,7,2,4);

 my($mad) = MAD(\@x);
 my($madn) = MADN(\@x);
 my($ql,qu) = idealf(\@x);
 my($winvar) = winvar(\@x);

FUNCTIONS ^

MAD

 my($mad) = MAD(\@x);

 Return the non-normalized Median Absolute Deviation.

MADN

 my($madn) = MADN(\@x);

 Return the Median Absolute Deviation normalized by the 0.75 quartile of the normal distribution.

idealf

 my($ql,$qu) = idealf(\@x); 

 Return the Ideal Fourths estimate of the lower and upper quartiles (in that order).

winvar

 my($winvar) = winvar(\@x,$tr);

 Return the Winsorized variance.  If the amount of trimming ($tr) is not specified, it defaults to 0.2.

trimvar

 my($trimvar) = trimvar(\@x,$tr);

 Return the variance for the trimmed mean with $tr trimming.  If the amount of trimming is not specified,
 it defaults to 0.2.

variance

 my($var) = variance(\@x);

 The unbiased sample variance.

msmedse

 my($mse) = msmedse(\@x);

 An estimate of the standard error of the median.

pbvar

 my($pb) = pbvar(\@x, $beta);

 The percentage-bend midvariance

AUTHOR ^

Walter Szeliga <szeliga@colorado.edu>

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