ipft (version 0.2.2)

ipfTransform: Transform function

Description

This function transforms the RSSI (Received Signal Strength Intensity) data to positive or exponential values

Usage

ipfTransform(data, trans = "positive", minRSSI = -104, maxRSSI = 0,
  noRSSI = 0, alpha = 24)

Arguments

data

a vector, matrix or data frame containing the RSSI vectors

trans

the transformations to perform

minRSSI

the minimum value for RSSI to consider when transforming the RSSI to positive values.

maxRSSI

the maximum value for RSSI to consider when transforming the RSSI to exponential values.

noRSSI

value used in the RSSI data to represent a not detected AP.

alpha

parameter for exponential transformation

Value

This function returns a vector, matrix or data frame containing the transformed data

Examples

    trainRSSI <- ipftrain[,1:168]
    ipfTransform(trainRSSI, trans = 'positive')

    trainRSSI <- ipftrain[,1:168]
    posTrainRSSI <- ipfTransform(trainRSSI, trans = 'positive')
    expTrainRSSI <- ipfTransform(posTrainRSSI, trans = 'exponential', maxRSSI = 104)