plot_ford: Ford Diagram

In tabula: Analysis and Visualization of Archaeological Count Data

Ford Diagram

Description

Plots a Ford (battleship curve) diagram.

Usage

plot_ford(object, ...)

## S4 method for signature 'matrix'
plot_ford(
  object,
  weights = FALSE,
  EPPM = FALSE,
  fill = "darkgrey",
  border = NA,
  axes = TRUE,
  ...
)

## S4 method for signature 'data.frame'
plot_ford(
  object,
  weights = FALSE,
  EPPM = FALSE,
  fill = "darkgrey",
  border = NA,
  axes = TRUE,
  ...
)

Arguments

object	A m \times p numeric matrix or data.frame of count data (absolute frequencies giving the number of individuals for each category, i.e. a contingency table).
...	Currently not used.
weights	A logical scalar: should the row sums be displayed?
EPPM	A logical scalar: should the EPPM be drawn? See seriograph().
fill	The color for filling the bars.
border	The color to draw the borders.
axes	A logical scalar: should axes be drawn on the plot? It will omit labels where they would abut or overlap previously drawn labels.

Value

plot_ford() is called for its side-effects: it results in a graphic being displayed (invisibly returns object).

Author(s)

N. Frerebeau

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_heatmap(), plot_rank(), plot_spot(), seriograph()

Examples

## Data from Lipo et al. 2015
data("mississippi", package = "folio")

## Plot a Ford diagram
plot_ford(mississippi)

plot_ford(mississippi, weights = TRUE)

tabula documentation built on Sept. 11, 2024, 6:40 p.m.