Name

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meanerr

Purpose (one Line)

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Calculate the mean and estimated errors for a set of data points

Description

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This routine is adapted from Program 5-1, XFIT, from "Data Reduction
and Error Analysis for the Physical Sciences", p. 76, by Philip R.
Bevington, McGraw Hill. This routine computes the weighted mean using
Instrumental weights (w=1/sigma^2).

Category

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Statistics

Calling Sequence

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meanerr,x,sigmax,xmean,sigmam,sigmad

Inputs

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x - Array of data points
sigmax - array of standard deviations for data points

Optional Input Parameters

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None.

Keyword Parameters

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None.

Outputs

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xmean - weighted mean
sigmam - standard deviation of mean
sigmad - standard deviation of data

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 Feb 20