R: Plot Method for isoreg Objects

plot.isoreg {stats} | R Documentation

## Plot Method for isoreg Objects

### Description

The `plot` and `lines` method for R objects of class `isoreg`.

### Usage

    ## S3 method for class 'isoreg'
    plot(x, plot.type = c("single", "row.wise", "col.wise"),
          main = paste("Isotonic regression", deparse(x$call)),
          main2 = "Cumulative Data and Convex Minorant",
          xlab = "x0", ylab = "x$y",
          par.fit = list(col = "red", cex = 1.5, pch = 13, lwd = 1.5),
          mar = if (both) 0.1 + c(3.5, 2.5, 1, 1) else par("mar"),
          mgp = if (both) c(1.6, 0.7, 0) else par("mgp"),
          grid = length(x$x) < 12, ...)

    ## S3 method for class 'isoreg'
    lines(x, col = "red", lwd = 1.5,
           do.points = FALSE, cex = 1.5, pch = 13, ...)

### Arguments

`x` | an `isoreg` object.
`plot.type` | character indicating which type of plot is desired. The first (default) only draws the data and the fit, where the others add a plot of the cumulative data and fit. Can be abbreviated.
`main` | main title of plot, see `title`.
`main2` | title for second (cumulative) plot.
`xlab, ylab` | x- and y- axis annotation.
`par.fit` | a `list` of arguments (for `points` and `lines`) for drawing the fit.
`mar, mgp` | graphical parameters, see `par`, mainly for the case of two plots.
`grid` | logical indicating if grid lines should be drawn. If true, `grid()` is used for the first plot, where as vertical lines are drawn at ‘touching’ points for the cumulative plot.
`do.points` | for `lines()`: logical indicating if the step points should be drawn as well (and as they are drawn in `plot()`).
`col, lwd, cex, pch` | graphical arguments for `lines()`, where `cex` and `pch` are only used when `do.points` is `TRUE`.
`...` | further arguments passed to and from methods.

### See Also

`isoreg` for computation of `isoreg` objects.

### Examples

    require(graphics)

    utils::example(isoreg) # for the examples there

    plot(y3, main = "simple plot(.)  +  lines(<isoreg>)")
    lines(ir3)

    ## 'same' plot as above, "proving" that only ranks of 'x' are important
    plot(isoreg(2^(1:9), c(1,0,4,3,3,5,4,2,0)), plot.type = "row", log = "x")

    plot(ir3, plot.type = "row", ylab = "y3")
    plot(isoreg(y3 - 4), plot.t="r", ylab = "y3 - 4")
    plot(ir4, plot.type = "ro",  ylab = "y4", xlab = "x = 1:n")

    ## experiment a bit with these (C-c C-j):
    plot(isoreg(sample(9),  y3), plot.type = "row")
    plot(isoreg(sample(9),  y3), plot.type = "col.wise")

    plot(ir <- isoreg(sample(10), sample(10, replace = TRUE)),
                      plot.type = "r")

[Package stats version 4.0.5 Index]