问题 I keep getting the following error when trying to run metaMDS() from the vegan package: my_mds <- vegan::metaMDS(df_species, distance="bray", k=2, trymax=1000, autotransform=TRUE) Error in .C("veg_distance", x = as.double(x), nr = N, nc = ncol(x), d = double(N * : "veg_distance" not available for .C() for package "vegan" I have tried: 1. searching online for this error - which yields zero results 2. reducing the size of my data frame to 17 rows and 12 columns 3. clearing all packages from