outliers: Outliers

Description Usage Arguments Value Author(s) References Examples

View source: R/outliers.R

Description

Identify outliers using modified Z-score

Usage

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outliers(x, s = 1.4826)

Arguments

x

A numeric vector

s

Scaling factor for mad statistic

Value

value for the modified Z-score

Author(s)

Jeffrey S. Evans <[email protected]>

References

Iglewicz, B. & D.C. Hoaglin (1993) How to Detect and Handle Outliers, American Society for Quality Control, Milwaukee, WI.

Examples

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 # Create data with 3 outliers
    x <- seq(0.1, 5, length=100) 
    x[98:100] <- c(100, 55, 250)
 
 # Calculate Z score
     Z <- outliers(x) 
 
 # Show number of extreme outliers using Z-score
     length(Z[Z > 9.9])
 
 # Remove extreme outliers 
     x <- x[-which(Z > 9.9)]

jeffreyevans/spatialEco documentation built on Aug. 11, 2018, 1:08 p.m.