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ÕâÊÇvarpart×Ô´øexample£¬Çó´óÉñ½â¶Á£ºÈý¸öÒò×Ó£¬ÎªÊ²Ã´ÅÜÍê³ÌÐòͼÖлá³öÏÖËĸöȦ£¿ data(mite) data(mite.env) data(mite.pcnm) # two explanatory data frames -- hellinger-transform y mod <- varpart(mite, mite.env, mite.pcnm, transfo="hel" ) mod ## use fill colours showvarparts(2, bg = c("hotpink","skyblue" )) plot(mod, bg = c("hotpink","skyblue" )) ## test fraction [a] using partial rda, '~ .' in formula tells to use ## all variables of data mite.env. afrac <- rda(decostand(mite, "hel" ) , mite.env, mite.pcnm) anova(afrac) ## rsquareadj gives the same result as component [a] of varpart rsquareadj(afrac) ## partition bray-curtis dissimilarities varpart(vegdist(mite), mite.env, mite.pcnm) ## three explanatory tables with formula interface mod <- varpart(mite, ~ subsdens + watrcont, ~ substrate + shrub + topo, mite.pcnm, data=mite.env, transfo="hel" ) mod showvarparts(3, bg=2:4) plot(mod, bg=2:4) ## use rda to test fraction [a] ## matrix can be an argument in formula rda.result <- rda(decostand(mite, "hell" ) ~ subsdens + watrcont + condition(substrate + shrub + topo) + condition(as.matrix(mite.pcnm)), data = mite.env) anova(rda.result) ## four explanatory tables mod <- varpart(mite, ~ subsdens + watrcont, ~substrate + shrub + topo, mite.pcnm[,1:11], mite.pcnm[,12:22], data=mite.env, transfo="hel" ) mod plot(mod, bg=2:5) ## show values for all partitions by putting 'cutoff' low enough: plot(mod, cutoff = -inf, cex = 0.7, bg=2:5) [ last edited by jjdg on 2019-5-7 at 09:11 ] [ Last edited by jjdg on 2019-5-7 at 09:11 ] |
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