lines.gqcStruct: lines Method for class 'gqc'

In grt: General Recognition Theory

Description

Add a quadratic decision boundary line through the current plot.

Usage

## S3 method for class 'gqcStruct'
lines(x, 
    xlim = c(0,1), ylim = c(0,1), 
    npoints = 100, col = "black", 
    ...)

Arguments

x	object of class gqcStruct
xlim	the x limits of the plot. Default to c(0,1)
ylim	the y limits of the plot. Default to c(0,1)
npoints	numeric. number of points per dimension used to plot the decision bound. Default is 100.
col	the color to be used for the line
...	further arguments.

Value

an invisible list of x- and y-coordinates of the line:

x	a vector of x-coordinates of the line
y	a vector of y-coordinates of the line

See Also

plot.gqc, {plot3d.gqc}

Examples

data(subjdemo_2d)
fit.2dq <- gqc(response ~ x + y, data=subjdemo_2d, 
     category=subjdemo_2d$category, zlimit=7)
plot(fit.2dq, fitdb=FALSE, initdb=FALSE)
lines(fit.2dq$par, xlim=c(0,400), ylim=c(0,400), col="red")
lines(fit.2dq$initpar, xlim=c(0,400), ylim=c(0,400), col="blue")

grt documentation built on May 2, 2019, 7:10 a.m.