Hi,
I am using R 2.9.0. It seems the documentation for the calculation of
Canberra distance using stats::dist is ambiguous. Does anyone have the
original definition given in the Lance & Williams paper from Aust. Comput.
J. 1, 15-20, 1967?
When there are zeros at certain position in both vectors,
Frédéric Chiroleu wrote:
> PS : Be careful with function dudi.pca() from ade4 ; in values, "norm"
> doesn't give you what is written in the help page : "norm" returns the
> vector of standard deviations of initial variables when you choose
> "normed" PCA and the vector of standard deviations of
Frédéric Chiroleu cirad.fr> writes:
>
> Hi,
>
> I misunderstand the definition of Canberra distance in R.
>
> On Internet and in function description pages of dist() from stats and
> Dist() from amap, Canberra distance between vectors x and y, d(x,y), is :
>
> d(x,y) = sum(abs(x-y)/(x+y))
>
Hi,
I misunderstand the definition of Canberra distance in R.
On Internet and in function description pages of dist() from stats and
Dist() from amap, Canberra distance between vectors x and y, d(x,y), is :
d(x,y) = sum(abs(x-y)/(x+y))
But in use, through simple examples, we find that the form
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