itemps: Functions to plot summary information about the sampled...

In tgp: Bayesian Treed Gaussian Process Models

Functions to plot summary information about the sampled inverse temperatures, tree heights, etc., stored in the traces of a "tgp"-class object

Description

Functions for making barplots summarizing the progress of importance tempering. The itemps.barplot function can be used to make a histogram of the inverse temperatures visited in the trans-temporal Markov chain. The hist2bar function is useful for making a histogram of integer-valued samples (e.g., tree heights) encountered in one or several Markov chains

Usage

itemps.barplot(obj, main = NULL, xlab = "itemps", 
               ylab = "counts", plot.it = TRUE, ...)
hist2bar(x)

Arguments

obj	"tgp"-class object
main	Main plot label to be augmented by itemps.barplot
xlab	Label for the x-axis
ylab	Label for the y-axis
plot.it	whether to plot the barplot in addition to returning the data.frame for later use in a barplot call
...	other arguments passed to barplot if plot.it = TRUE
x	matrix of integers whose columns are treated as different realizations of similar processes producing where each row represents a sample (e.g., tree height) under that process

Details

itemps.barplot specifically works with the $trace field of a "tgp"-class object. An error will be produced if this field is NULL, i.e., if the b* function used the create the object was not run with the argument trace=TRUE

The hist2bar function can be used on any integer (or discrete) valued matrix. The columns are interpreted as different realizations of similar processes for comparison with one another via a histogram.

The histogram is obtained with the barplot command used with the argument beside=TRUE. See the examples section of default.itemps

Value

Both functions return a data.frame that can be used within the barplot function with argument beside=TRUE

Author(s)

Robert B. Gramacy, [e-mail], and Matt Taddy, [e-mail]

References

Gramacy, R.B., Samworth, R.J., and King, R. (2007) Importance Tempering. ArXiv article 0707.4242 https://arxiv.org/abs/0707.4242

https://bobby.gramacy.com/r_packages/tgp/

See Also

default.itemps, vignette(tgp2), barplot

tgp documentation built on Sept. 11, 2024, 8:22 p.m.