testFilters function

testFilters

This function performs a test with a series of filters defined by the user, for the maximum number of variables determined. This function can be used to compare the performance of different filters with a different number of variables to be considered and the differences between a linear and a quadratic discriminant.

testFilters(
  series,
  labels,
  maxvars,
  filters = c("haar", "d4", "d6", "d8", "la8"),
  features = c("Var", "Cor", "IQR", "PE", "DM"),
  lev = 0
)

Arguments

• series: Samples from the population (dim x length x cases)
• labels: Labeled vector that classify the observations.
• maxvars: maximum number of variables included by the StepDiscrim algorithm. Must be grater than 0 and, in normal cases, lesser than 100
• filters: Vector indicating the filters to be tested. To see the available filters use the function availableFilters
• features: A list of characteristics that will be used for the classification process. To see the available features see availableFeatures
• lev: Wavelet decomposition level, by default is selected using the "conservative" strategy. See chooseLevel function.

Returns

A list that each element contains:

• CM: confusion matrix with a particular configuration using LOOCV
• Classification: a vector with the raw classification result. "1" if the observation belongs to the population 1 and "2" if belongs to the population 2.
• NVars: the total numbers of variables have been taken into account in the classification process
• Method: type of classifier used.
• Filter: filter used in the MultiWave analysis process
• Features: vector containing the features taken into account

Examples

load(system.file("extdata/ECGExample.rda",package = "TSEAL"))
# The dataset has the first 5 elements of class 1
# and the last 5 of class 2.
labels <- c(rep(1, 5), rep(2, 5))
result <- testFilters(ECGExample, labels, features=c("var","cor"),
          filters= c("haar","d4"), maxvars = 3)

See Also

• LOOCV
• MultiWaveAnalysis
• StepDiscrim
• availableFilters
• availableFeatures