Plots a Ford (battleship curve) diagram.
Usage
plot_ford(object, ...)
# S4 method for matrix
plot_ford(object, EPPM = FALSE)
# S4 method for data.frame
plot_ford(object, EPPM = FALSE)
Arguments
- object
A \(m \times p\)
numeric
matrix
ordata.frame
of count data (absolute frequencies giving the number of individuals for each class).- ...
Currently not used.
- EPPM
A
logical
scalar: should the EPPM be drawn? This argument is defunct: useseriograph()
instead.
Value
A ggplot2::ggplot object.
References
Ford, J. A. (1962). A quantitative method for deriving cultural chronology. Washington, DC: Pan American Union. Technical manual 1.
See also
Other plot methods:
matrigraph()
,
plot_bertin()
,
plot_diceleraas()
,
plot_diversity
,
plot_heatmap()
,
plot_rank()
,
plot_spot()
,
seriograph()
Examples
## Data from Desachy 2004
data("compiegne", package = "folio")
## Plot a Ford diagram
plot_ford(compiegne)