Format Distance Matrix (Matlab Style)
Format or generate a distance matrix.
squareform(x)
x |
numeric vector or matrix. |
If x is a vector as created by the dist function, it converts
it into a fulll square, symmetric matrix.
And if x is a distance matrix, i.e. square, symmetric amd with zero
diagonal elements, it returns the flattened lower triangular submatrix.
Returns a matrix if x is a vector,
and a vextor if x is a matrix.
x <- 1:6 y <- squareform(x) # 0 1 2 3 # 1 0 4 5 # 2 4 0 6 # 3 5 6 0 all(squareform(y) == x) # TRUE
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