interval_hdr: Highest Density Regions

In ananke: Quantitative Chronology in Archaeology

Highest Density Regions

Description

Highest Density Regions

Usage

## S4 method for signature 'CalibratedAges,missing'
interval_hdr(x, level = 0.954, ...)

Arguments

x	A CalibratedAges object.
level	A length-one numeric vector giving the confidence level.
...	Currently not used.

Value

A CalibratedIntervals object.

Author(s)

N. Frerebeau

References

Hyndman, R. J. (1996). Computing and graphing highest density regions. American Statistician, 50: 120-126. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.2307/2684423")}.

See Also

stats::density(), arkhe::interval_hdr()

Other statistics: interval_credible(), mean(), median(), quantile()

Examples

## Calibrate multiple dates
cal <- c14_calibrate(
  values = c(5000, 4500),
  errors = c(45, 35),
  names = c("X", "Y")
)

## HDR
hdr68 <- interval_hdr(cal, level = 0.683)
hdr95 <- interval_hdr(cal, level = 0.954)
hdr99 <- interval_hdr(cal, level = 0.997)

## Coerce to data.frame
as.data.frame(hdr95, calendar = BC())

## Plot
plot(cal, interval = "hdr")

ananke documentation built on June 8, 2025, 12:14 p.m.