R: Matrix Image Plots

image {cba} | R Documentation

## Matrix Image Plots

### Description

Implements a wrapper function to `image` for proper plotting of objects of class `matrix` and `dist`.

### Usage

    implot(x, xlab = "", ylab = "", axes = FALSE, ticks = 10,
           las = 2, ...)

### Arguments

`x` | an object of class `matrix` or `dist`.
`xlab, ylab` | labels for the x and y axis.
`axes` | logical, indicating whether `dimnames(x)` should be drawn on the plot.
`ticks` | the number of tick-marks to use.
`las` | the axis style to use (see `par`).
`...` | further arguments to `image`.

### Details

Plots an object of class `matrix` in its original row and column orientation. This means, in a plot the columns become the x-coordinates and the reversed rows the y-coordinates.

If `x` is of class `dist` it is coerced to full-storage `matrix` representation.

### Value

Returns the transformed `x` invisibly.

### Author(s)

Christian Buchta

### See Also

`image` and `par` for details.

### Examples

    x <- matrix(sample(c(FALSE, TRUE),100,rep=TRUE),ncol=10,
    	    dimnames=list(1:10,LETTERS[1:10]))
    implot(x)
    implot(x, col=c("white","black"), axes = TRUE)

[Package cba version 0.2-21 Index]