# plot.xy: Basic Internal Plot Function

 plot.xy R Documentation

## Basic Internal Plot Function

### Description

This is the internal function that does the basic plotting of points and lines. Usually, one should rather use the higher level functions instead and refer to their help pages for explanation of the arguments.

### Usage

```plot.xy(xy, type, pch = par("pch"), lty = par("lty"),
col = par("col"), bg = NA,
cex = 1, lwd = par("lwd"), ...)
```

### Arguments

 `xy` A four-element list as results from `xy.coords`. `type` 1 character code: see `plot.default`. `NULL` is accepted as a synonym for `"p"`. `pch` character or integer code for kind of points, see `points.default`. `lty` line type code, see `lines`. `col` color code or name, see `colors`, `palette`. Here `NULL` means colour 0. `bg` background (fill) color for the open plot symbols 21:25: see `points.default`. `cex` character expansion. `lwd` line width, also used for (non-filled) plot symbols, see `lines` and `points`. `...` further graphical parameters such as `xpd`, `lend`, `ljoin` and `lmitre`.

### Details

The arguments `pch`, `col`, `bg`, `cex`, `lwd` may be vectors and may be recycled, depending on `type`: see `points` and `lines` for specifics. In particular note that `lwd` is treated as a vector for points and as a single (first) value for lines.

`cex` is a numeric factor in addition to `par("cex")` which affects symbols and characters as drawn by `type` `"p"`, `"o"`, `"b"` and `"c"`.

`plot`, `plot.default`, `points`, `lines`.
```points.default # to see how it calls "plot.xy(xy.coords(x, y), ...)"