Compute L2 distance between two vectors of numbers.
Compute L2 distance between two vectors of numbers (square root of sum of squares of differences between two vectors).
l2norm(u,v)
u |
first vector of numbers |
v |
second vector of numbers |
Function simply computes the L2 distance between two vectors and is implemented as
sqrt(sum((u-v)^2))
A real number which is the L2 distance between two vectors.
Version 3.6 Copyright Guy Nason 1995
This function would probably be more accurate if it used the Splus function vecnorm.
G P Nason
# # What is the L2 norm between the following sets of vectors # p <- c(1,2,3,4,5) q <- c(1,2,3,4,5) r <- c(2,3,4,5,6) l2norm(p,q) # [1] 0 l2norm(q,r) # [1] 2.236068 l2norm(r,p) # [1] 2.236068
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