ecodist (version 2.1.3)

fixdmat: Distance matrix conversion

Description

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

Usage

fixdmat(v)

Value

full symmetric distance matrix.

Arguments

v

lower-triangular distance matrix in row order.

Author

Sarah Goslee

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.

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))