Displaying 1 result from an estimated 1 matches for "3dminimum".
2007 Sep 23
0
Beginners question about Percentage similarity in R?
...ssess the differences in spider faunas (Strattton and Uetz,
1979).
I like the method but have been trying to work out what function in R
to use to get the percentage similarity. I have vegan installed and
have been using it. I think R is brilliant. But using the formula...
PS=3D2w/(a+b)
where w=3Dminimum sum of individuals of species held in common
between the samples being compared; a and b =3 the totals of
individuals found in either region. I have had trouble working out
from the help extract from designdist which of the methods is the
percentage.
What does it mean when someone says 'minim...