ggtile {ggplot} | R Documentation

## Grob function: tile

### Description

Add tiles to a plot

### Usage

    ggtile(plot = .PLOT, aesthetics=list(), ..., data=NULL)

### Arguments

`plot` | the plot object to modify
`aesthetics` | named list of aesthetic mappings, see details for more information
`...` | other options, see details for more information
`data` | data source, if not specified the plot default will be used

### Details

The tile grob will tile the plot surface as densly as possible, assuming that every tile is the same size. It is similar to `levelplot` or `image`.

Aesthetic mappings that this grob function understands:

- `x`:x position (required)
- `y`:y position (required)
- `width`:width of the rectangle
- `height`:height of the rectangle
- `fill`:fill colour (see `sccolour)`

These can be specified in the plot defaults (see `ggplot`) or in the `aesthetics` argument. If you want to modify the position of the points or any axis options, you will need to add a position scale to the plot. These functions start with `ps`, eg. `pscontinuous` or `pscategorical`

Other options:

- none

### Author(s)

Hadley Wickham <h.wickham@gmail.com>

### See Also

`ggrect`, `resolution`

### Examples

    pp <- function (n,r=4) {
    x <- seq(-r*pi, r*pi, len=n)
    df <- expand.grid(x=x, y=x)
    df$r <- sqrt(df$x^2 + df$y^2)
    df$z <- cos(df$r^2)*exp(-df$r/6)
    df
    }
    p <- ggplot(pp(20), aes=list(x=x,y=y))
    ggtile(p) #pretty useless!
    ggtile(p, list(fill=z))
    ggtile(p, list(height=abs(z), width=abs(z)))
    ggtile(ggplot(pp(100), aes=list(x=x,y=y,fill=z)))
    ggtile(ggplot(pp(100, r=2), aes=list(x=x,y=y,fill=z)))
    p <- ggplot(pp(20)[sample(20*20, size=200),], aes=list(x=x,y=y,fill=z))
    ggtile(p)

[Package ggplot version 0.4.2 Index]