cca
Dear Mahnaz, Maybe the sum of sand+gravel+silt is always 1 or 100%. There are only 3 canonical axes suggesting that you have only 3 independent environmental variables. cca may handle such cases by this way. Best wishes Zoltan 2014.08.03. 17:24 keltez?ssel, Mahnaz Rabbaniha ?rta:
Dear all
I have done cca in vegan pakage;
two text file are included:
*bio*
[1] "Ampharetidae" "Sponoidae" "Naeidae" "Balanidae"
"Gammaridae"
[6] "Cyprididae" "Cardidae" "Dreissenidae" "Semelidae"
*mo*
"sand" "gravel" "silt" "TOM"
vare.cca <- cca(bio,mo)
summary(vare.cca)
Biplot scores for constraining variables
CCA1 CCA2 CCA3 CA1 CA2 CA3
sand 0.08356 -0.4027 -0.9111 0 0 0
gravel 0.15836 0.8716 -0.4676 0 0 0
TOM 0.63367 -0.6390 0.4239 0 0 0
*silt is not in the summary part??/*
Please inform me what is problem
all the best
Botta-Duk?t Zolt?n -------------------------------- ?kol?giai ?s Botanikai Int?zet Magyar Tudom?nyos Akad?mia ?kol?giai Kutat?k?zpont -------------------------------- 2163. V?cr?t?t, Alkotm?ny u. 2-4. tel: +36 28 360122/157 fax: +36 28 360110 botta-dukat.zoltan at okologia.mta.hu www.okologia.mta.hu Zolt?n BOTTA-Duk?t -------------------------------- Institute of Ecology and Botany Hungarian Academy of Sciences Centre for Ecological Research -------------------------------- H-2163 V?cr?t?t, Alkom?ny u. 2-4. HUNGARY Phone: +36 28 360122/157 Fax..: +36 28 360110 botta-dukat.zoltan at okologia.mta.hu www.okologia.mta.hu