plot.isoreg {modreg} R Documentation

## Plot Method for isoreg Objects

### Description

The `plot` 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, ...)
```

### 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. `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. `...` further arguments passed to and from methods.

`isoreg` for computation of `isoreg` objects.

### Examples

```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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