click function

Identify points on plot

Extension of the identify function

## Default S3 method:
click(x, y=NULL, label=TRUE, n=length(x), pch=19, col="orange", cex=3, ...)
idplot(x, y ,..., id=list(), return.data=FALSE)

Arguments

• x: X coordinates
• ...: Additional arguments parsed to plot function
• y: Y coordinates
• label: Should labels be added?
• n: Max number of inputs to expect
• pch: Symbol
• col: Colour
• cex: Size
• id: List of arguments parsed to click function
• return.data: Boolean indicating if selected points should be returned

Details

For the usual 'X11' device the identification process is terminated by pressing any mouse button other than the first. For the 'quartz' device the process is terminated by pressing either the pop-up menu equivalent (usually second mouse button or 'Ctrl'-click) or the 'ESC' key.

Examples

if (interactive()) {
    n <- 10; x <- seq(n); y <- runif(n)
    plot(y ~ x); click(x,y)

    data(iris)
    l <- lm(Sepal.Length ~ Sepal.Width*Species,iris)
    res <- plotConf(l,var2="Species")## ylim=c(6,8), xlim=c(2.5,3.3))
    with(res, click(x,y))

    with(iris, idplot(Sepal.Length,Petal.Length))
}

See Also

idplot, identify

Author(s)

Klaus K. Holst