Name

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moment4

Purpose (one Line)

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Compute various statistical moments of the data.

Description

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This routine computes the average, average deviation, standard
deviation, variance, skew and kurtosis of the input data. The various
output quantities are always returned as floating point scalars.
The statistics are compute with no regard for the dimensionality of
the input data.

Category

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Statistics

Calling Sequence

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moment4,data,avg,avgdev,stddev,var,skew,kurt

Inputs

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data - Input data to be analyzed.

Optional Input Parameters

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None.

Keyword Parameters

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None.

Outputs

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avg - Sample mean.
avgdev - Average deviation of the data from the mean.
stddev - Standard deviation of the data from the mean.
var - Variance of the data from the mean.
skew - Skewness, third statistical moment.
kurt - Kurtosis, fourth statistical moment.

Common Blocks

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None.

Side Effects

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None.

Restrictions

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None.

Procedure

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Modification History

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Written by Marc W. Buie, Lowell Observatory, 1992 Jan 20
  1997/09/06, MWB, changed name from moment to avoid name conflict.
  2000/11/2, MWB, modified to use the IDL system function moment. This
    routine really does nothing more than rewrap the IDL function.