R: Draw a color-coded triangular matrix

trianglegram {squash} | R Documentation

## Draw a color-coded triangular matrix

### Description

This function is called by `distogram`, and probably isn't very useful by itself.

### Usage

    trianglegram(x, labels = rownames(x),
        lower = TRUE, diag = FALSE, right = FALSE,
        add = FALSE, xpos = 0, ypos = 0, xlim, ylim, ...)

### Arguments

`x` | A square matrix containing color values.
`labels` | Labels.
`lower` | If TRUE, use `lower.tri`, else use `upper.tri`.
`diag` | Include the diagonal elements of `x`?
`right` | Should triangle point to the right or left?
`add` | Add to an existing plot?
`xpos, ypos` | Location of bottom point of the triangle.
`xlim, ylim` | Plotting limits.
`...` | Further arguments passed to `plot`.

### Details

The input must be a (square) matrix; however, only part of the matrix (the upper or lower triangle) is displayed.

### Value

none.

### See Also

`distogram`, `corrogram`

### Examples

      m <- matrix(jet(40), nrow = 20, ncol = 20)
      trianglegram(m)

      ## just for fun
      trianglegram(m, labels = NA, right = TRUE, add = TRUE, xpos = 1)

[Package squash version 1.0.8 Index]