PlotPosteriors: PlotPosteriors

In PDEnaiveBayes: Plausible Naive Bayes Classifier Using PDE

PlotPosteriors

Description

Plots posteriors either using a panel of plots based on PlotBayesianDecision2D or in 1D as a line plot.

Usage

PlotPosteriors(Data, Posteriors, Class = 1, CellColorsOrPallette,
Showpoints = TRUE)

Arguments

Data	Either numeric matrix [1:n, 1:d] with data or one column of data.
Posteriors	[1:n, 1:Class] matrix of posteriors.
Class	Integer defining which class to look at if numeric matrix is given, for column of data all posteriors are overlayed in line plot.
CellColorsOrPallette	Either a function defining the color palette of a character vector or character vector of length NoBins stating colors.
Showpoints	TRUE, points are displayed.

Details

Plotting posteriors in one directions only often does not give any insight. The default option using PlotBayesianDecision2D os often more useful.

Value

GGobj

ggplot2 object containing 2D visualization of Posteriori.

Author(s)

Michael Thrun

Examples

Data = as.matrix(iris[,1:4])
Cls = as.numeric(iris[,5])

TrainIdx = c(17, 73, 46, 29, 68, 35, 131, 62, 132, 127, 71, 72, 
144, 99, 93, 13, 38, 21, 102, 53, 36, 111, 114, 96, 57, 74, 145, 
86, 3, 16, 52, 59, 140, 40, 122, 109, 6, 91, 79, 15, 108, 139, 
37, 76, 20, 115, 66, 28, 100, 117, 44, 78, 80, 150, 146, 142, 
9, 90, 45, 58, 134, 11, 87, 125, 141, 118, 136, 48, 124, 47, 
8, 27, 33, 92, 130, 54, 65, 104, 23, 98, 129, 123, 34, 128, 135, 
51, 64, 5, 94, 83, 42, 116, 101, 43, 7, 12, 82, 1, 84, 138, 2, 
56, 4, 106, 120)

TestIdx = c(60, 10, 75, 70, 81, 18, 97, 95, 67, 22, 55, 143, 
88, 24, 105, 26, 119, 31, 107, 63, 41, 61, 32, 147, 89, 14, 121, 
19, 113, 49, 126, 112, 25, 77, 137, 103, 50, 30, 149, 110, 39, 
69, 148, 85, 133)

TrainX = Data[TrainIdx, ]
TestX  = Data[TestIdx, ]
TrainY = Cls[TrainIdx]
TestY  = Cls[TestIdx]

VPDENB = Train_naiveBayes(Data = TrainX, Cls = TrainY, Plausible = FALSE)
#default option
PlotPosteriors(Data = TrainX, Posteriors = VPDENB$Posteriors, Class = 1)

# alternative option
PlotPosteriors(Data = TrainX[,3], Posteriors = VPDENB$Posteriors)

PDEnaiveBayes documentation built on Nov. 17, 2025, 5:07 p.m.