Dear list memnbers,
I would greatly appreciate any suggestion on how to get averaged
distance values (and errors) between groups of samples using vegan
(vegdist, dist,...).
As an example, I have a faunal table (samples by taxa, "mMCINVmmh")
and some grouping factors (for example: "gradreg_mmh") that I want to
test, like this:
vegdist(mMCINVmmh, method="bray", binary=FALSE, diag=F, upper=F)->vegdist1
vegdist1
TR_1_2 TR_1_3 TR_2_2 TR_2_3 TR_3_1 TR_3_2
TR_1_3 0.7361704
TR_2_2 0.1509007 0.7785157
TR_2_3 0.6465259 0.4095644 0.6832353
TR_3_1 0.8717468 0.9572968 0.8551546 0.9373980
TR_3_2 0.6925163 0.7197110 0.7428020 0.4742819 0.7800620
TR_3_3 0.8166542 0.7199418 0.8365397 0.6215122 0.8582932 0.5364242
gradreg_mmh
[1] 0 0 3 3 5 5 5
Levels: 0 3 5
So I want to get the pairwise mean distances and errors between groups
0, 3 and 5...
many thanks in advance,
Andrés
--
Andrés Mellado Díaz
Centre for Hydrological Studies CEH-CEDEX
Water Quality Department
Pº bajo de la Virgen del Puerto, 3
28005, Madrid
SPAIN
--
Andrés Mellado Díaz
Centre for Hydrological Studies CEH-CEDEX
Water Quality Department
Pº bajo de la Virgen del Puerto, 3
28005, Madrid
SPAIN
_______________________________________________
R-sig-ecology mailing list
R-sig-ecology@r-project.org
https://stat.ethz.ch/mailman/listinfo/r-sig-ecology
