fixdmat: Distance matrix conversion

In phiala/ecodist: Dissimilarity-Based Functions for Ecological Analysis

Distance matrix conversion

Description

Convert a row-order lower-triangular distance matrix to a full symmetric matrix.

Usage

  fixdmat(v)

Arguments

v	lower-triangular distance matrix in row order.

Details

R distance functions such as dist and bcdist return a lower triangular distance matrix in column order. Some other programs return the lower triangular matrix in row order. To use this matrix in R functions, it must be converted from row order to column order.

Value

full symmetric distance matrix.

Author(s)

Sarah Goslee

See Also

lower, full

Examples

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))

phiala/ecodist documentation built on Nov. 5, 2023, 10:47 a.m.