I ran metaMDS and want to plot and color code by a grouping based on certain data frame characters. In my original data frame, df$yr are years and df$2 are sites. I want to color by the years.
caltmds <- metaMDS(df[,3:12], k=3)
plot(caltmds, type = 'n')
cols <- c("red2", "mediumblue")
points(caltmds, col = cols[df$yr])
I also tried from this post:
scl <- 3
colvec <- c("red2", "mediumblue")
plot(caltmds, type = "n", scaling = scl)
with(df, points(caltmds, display = "sites", col = colvec[yr], pch = 21, bg = colvec[yr]))
text(caltmds, display = "species", cex = 0.8, col = "darkcyan")
with(df, legend("topright", legend = levels(yr), bty = "n", col = colvec, pch = 21, pt.bg = colvec))
Nothing plots
#DATA
df1 = mtcars
mycolors = df1$cyl #Identify the grouping vector
library(vegan)
m = metaMDS(df1)
x = scores(m) #Extract co-ordinates
plot(x, col = as.numeric(as.factor(mycolors)))