setDist {rrp} | R Documentation |
Sets the elements of a dist object to a constant vector-wise. The idea is that
a symmetrix matrix M
can be represented as a triangular object {d}.
With this function you set M[x,x] = k
but instead of working on
M
this function works on its dist
representation d
.
setDist(d, x, k)
d |
a dist object, upper diagonal, representing a symmetric matrix |
x |
a vector of indices |
k |
the constant to the elements will be set to |
returns the modified dist object
S. M. Iacus
M <- matrix(1:100,5,20) M <- M d <- as.dist(M) x <- 1:3 setDist(d,x,0) d # which is the equivalent of (apart for the diagonal elements) M[x,x] <- 0 # Indeed, we have d as.dist(M)