plotSamples {LaplacesDemon}

Plot Samples

Description

This function provides basic plots that are extended to include samples.

Usage

plotSamples(X, Style="KDE", LB=0.025, UB=0.975, Title=NULL)

Arguments

X

This required argument is a N \times S numerical matrix of N records and S samples.

Style

This argument accepts the following quoted strings: "barplot", "dotchart", "hist", "KDE", or "Time-Series". It defaults to Style="KDE".

LB

This argument accepts the lower bound of a probability interval, which must be in the interval [0,0.5).

UB

This argument accepts the upper bound of a probability interval, which must be in the interval (0.5,1].

Title

This argument defaults to NULL, and otherwise accepts a quoted string that will be the title of the plot.

Details

The plotSamples function extends several basic plots from points to samples. For example, it is common to use the hist function to plot a histogram from a column vector. However, the user may desire to plot a histogram of a column vector that was sampled numerous times, rather than a simple column vector, in which a (usually 95%) probability interval is also plotted to show the uncertainty around the sampled median of each bin in the histogram.

The plotSamples function extends the barplot, dotchart, and hist functions to include uncertainty due to samples. The KDE style of plot is added so that a probability interval is shown around a sampled kernel density estimate of a distribution, and the Time-Series style of plot is added so that a probability interval is shown around a sampled univariate time-series.

For each style of plot, three quantiles are plotted: the lower bound (LB), median, and upper bound (UB).

One of many potential Bayesian applications is to examine the uncertainty in a predictive distribution.

Author(s)

Statisticat, LLC. [e-mail]

Examples

#library(LaplacesDemon)
#N <- 100
#S <- 100
#X <- matrix(rnorm(N*S),N,S)
#rownames(X) <- 1:100
#plotSamples(X, Style="barplot", LB=0.025, UB=0.975)
#plotSamples(X[1:10,], Style="dotchart", LB=0.025, UB=0.975)
#plotSamples(X, Style="hist", LB=0.025, UB=0.975)
#plotSamples(X, Style="KDE", LB=0.025, UB=0.975)
#plotSamples(X, Style="Time-Series", LB=0.025, UB=0.975)