plot.isoreg {modreg}R Documentation

Plot Method for isoreg Objects


The plot method for R objects of class isoreg.


## 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", = 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, ...)


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.
main main title of plot, see title.
main2 title for second (cumulative) plot.
xlab, ylab x- and y- axis annotation. 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.
... further arguments passed to and from methods.

See Also

isoreg for computation of isoreg objects.


example(isoreg) # for the examples there

## '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.t = "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.t = "r")

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