R: Full symmetric matrix

full {ecodist} | R Documentation

## Full symmetric matrix

### Description

Convert a column order distance matrix to a full symmetric matrix.

### Usage

      full(v)

### Arguments

`v` | lower-triangular column order distance matrix.

### Details

Converts a column order lower-triangular distance matrix as written by R functions into a symmetric matrix. Note that `lower()` used on a 1x1 matrix will return the single element, which may not be the correct behavior in all cases, while `full()` used on a single element will return a 2x2 matrix.

### Value

full symmetric matrix.

### Author(s)

Sarah Goslee

### See Also

`lower`, `fixdmat`

### Examples

    # Given a vector:
    x.vec <- seq_len(6)
    x.vec

    # Make an R-style column order symmetric matrix
    full(x.vec)

    # Extract the lower triangle from a symmetric matrix
    # in column order
    lower(full(x.vec))

    # Convert to or from a row order symmetric matrix
    fixdmat(x.vec)
    lower(fixdmat(x.vec))

    fixdmat(c(1, 2, 4, 3, 5, 6))

[Package ecodist version 2.0.1 Index]