mean.errors {errors}

Arithmetic Mean and Median Value

Description

S3 methods for errors objects.

Usage

## S3 method for class 'errors'
mean(x, trim = 0, na.rm = FALSE, ...)

## S3 method for class 'errors'
weighted.mean(x, ..., na.rm = FALSE)

## S3 method for class 'errors'
median(x, na.rm = FALSE, ...)

Arguments

x

an errors object.

trim

the fraction (0 to 0.5) of observations to be trimmed from each end of x before the mean is computed. Values of trim outside that range are taken as the nearest endpoint.

na.rm

a logical evaluating to TRUE or FALSE indicating whether NA values should be stripped before the computation proceeds.

...

further arguments passed to of from other methods.

Details

The mean and weighted.mean methods set the uncertainty as the maximum of the standard deviation of the mean and the (weighted) mean of the uncertainty.

The median method sets the uncertainty as 1.253 * errors(mean(x)), which is derived from the asymptotic variance formula of the median. Note that this value is valid only if the sample is big enough.

Value

An errors object.