| wrap.meaningdistfunction {cultevo} | R Documentation |
Make a meaning distance function vectorisable.
Description
This function takes as its only argument a function f(m1, m2) which
returns a single numeric indicating the distance between two 'meanings'
m1, m2 (which are themselves most likely vectors or lists). Based
on f, this function returns a function g(mm) which takes as
its only argument a matrix or data frame mm with the meaning
elements (equivalent to the ones in m1, m2) along columns and
different meaning combinations (like m1, m2, ...) along rows. This
function returns a distance matrix of class dist
containing all pairwise distances between the rows of mm. The
resulting function g can be passed to other functions in this
package, in particular mantel.test.
Usage
wrap.meaningdistfunction(pairwisemeaningdistfun)
Arguments
pairwisemeaningdistfun |
a function of two arguments returning a single numeric indicating the semantic distance between its arguments |
Details
The meaning distance function should be commutative, i.e.
f(a,b) = f(b,a), and meanings should have a distance of zero to
themselves, i.e. f(a,a) = 0.
Value
A function that takes a meaning matrix and returns a corresponding
distance matrix of class dist.
Examples
trivialdistance <- function(a, b) return(a - b)
trivialmeanings <- as.matrix(3:1)
trivialdistance(trivialmeanings[1], trivialmeanings[2])
trivialdistance(trivialmeanings[1], trivialmeanings[3])
trivialdistance(trivialmeanings[2], trivialmeanings[3])
distmatrixfunction <- wrap.meaningdistfunction(trivialdistance)
distmatrixfunction(trivialmeanings)