removeSpikes: removeSpikes

In NCAR/Ranadu: Functions for use with RAF aircraft data files

removeSpikes

Description

Identifies spikes and replaces them via interpolation

Usage

removeSpikes(v, sdLimit = 4, runLength = 99, loops = 4)

Arguments

v	The variable from which to remove spikes.
sdLimit	The multiple of the running standard deviation at which to remove spikes. Default is 4.
runLength	The number of measurements over which to calculate the running mean and standard deviation. The default is 99.
loops	The number of times to iterate the calculation.

Details

The function calculates a running mean and standard deviation, then flags points for which the deviation from the mean exceeds a specified multiplier times the running standard deviation. It then replaces those points by interpolation. It repeats this up to a specified number of times, in case the running values are changed by the removal-and-interpolation process.

Value

The input vector with identified spikes removed and replaced by interpolation.

Author(s)

William Cooper

Examples

RAFdata$DSPIKED <- removeSpikes(RAFdata$ATTACK)
RAFdata$DSPIKED <- removeSpikes(RAFdata$ATTACK, sdLimit=2, runLength=49, loops=10)

NCAR/Ranadu documentation built on Jan. 27, 2023, 1:09 a.m.