Quoting Celine Lefebvre <lefebvre at cephb.fr>:
> I am trying to use the function CAIV from the package CoCoAn
> I have a matrix with dimension 43x67 with positive values >=0
> When I use CAIV, I get the error:
> "Error : column total=0"
> Does someone know why?
I guess you have a column total of 0. That is, you have a species with no
presences in your matrix. All kinds of CA (including CCA) need >0 column and
row totals.
Assuming your data matrix is called `x', use `apply(x, 2, sum)' to see
the
column totals and spot the missing species.
Cheers, jari oksanen
--
Jari Oksanen, Department of Natural Resources
Utah State University, Logan UT
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