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analogue (version 0.10-0)

plot.logitreg: Produces plots of analogue logistic regression models

Description

Draws the fitted logistic regression function describing the posterior probability that two sites are analogues conditional upon the dissimilarity between the two samples. Confidence intervals are also computed and displayed if requested.

Usage

## S3 method for class 'logitreg':
plot(x, group = "all", npred = 100,
     conf.int = 0.9, conf.type = c("none", "polygon", "lines"),
     xlab = expression(D[ij]), ylab = "Pr (A+ | d)",
     rug = TRUE, ticksize = 0.02,
     col = "red", ref.col = "lightgrey",
     lwd = 2, conf.lwd = 1, conf.lty = "dashed",
     shade = "lightgrey", ...)

Arguments

x
object to plot; an object of class "logitreg", usually the result of a call to logitreg.
group
The group to plot the logit model for. Can be one of the group labels or "Combined" to draw the individual logit models. Alternatively, and the default, is to use "all", which divides the plotting region into the requ
npred
number of points at which the fitted curves are evaluated for plotting purposes.
conf.int
numeric; the confidence interval required.
conf.type
character; how should the confidence interval be drawn. Default is not to draw the confidence interval.
xlab, ylab
character; the x and y axis labels.
rug
logical; should rug plots be drawn?
ticksize
The size of the tick marks used in rug plots.
col
The colour in which to draw the line representing the fitted values.
ref.col
The colour of the reference lines drawn at 0 and 1.
lwd
The line width in which to draw the line representing the fitted values.
conf.lwd, conf.lty
Line width and line type for the confidence interval. Only used if conf.type = "lines" is specified.
shade
The colour for the fill and border of the confidence interval if conf.type = "polygon" is specified.
...
arguments passed on to plot.

Value

  • A plot on the current device.

See Also

logitreg for an example, roc