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dailliez
2010 Apr 13
0
dbFD computing distinct species wrong?
..., "site4")
colnames (comm) <- c("spA", "spB", "spC", "spD")
comm # note that site 1 has only spA and spB, so I'd expect it to
# have sing.sp = 0 (no singular species)
require (FD)
ex1 <- dbFD (fd, comm, w.abun = FALSE, corr="cailliez", clust.type="ward")
ex1 # site 1 comes out with sing.sp = 2. Why is that?
Any insight / advice would be greatly appreciated!
Many thanks,
Sarah
University of Chicago
[[alternative HTML version deleted]]
2018 Jan 10
0
Problem with dbFD function in FD library
...for my data. When I run the function with ?calc.Frich=T?, I see the warning
that I wrote below and no one of the values are calculated.
Could you please tell me how can I fix this problem and have the FRic value
for my data?
Func.div?dbFD ( trait_data, abundance_data, calc.FRic = T, corr="cailliez",
w.abun = T, CWM.type = "all" )
FRic: Dimensionality reduction was required. The last PCoA axis (out of 6
in total) was removed.
FRic: Quality of the reduced-space representation = 0.9402678
QH6114 qhull precision error: initial simplex is not convex.
Distance=-2.7e-15
Error in...