title: Plotting RDA (vegan) in ggplot
body: <p>I'm still new to R, trying to learn how to use the library vegan, which I can easily plot in R with the normal plot function. The problem arises when I want to plot the data in ggplot. I know I have to extract the right data from the list I've created, but which and how? The dataset I've been practicing on can be downloaded here <a href="https://drive.google.com/file/d/0B1PQGov60aoudVR3dVZBX1VKaHc/view?usp=sharing" rel="nofollow">https://drive.google.com/file/d/0B1PQGov60aoudVR3dVZBX1VKaHc/view?usp=sharing</a>
  The code I've been using to get the data transformed is this:</p>
  
  <pre><code>library(vegan)
  library(dplyr)
  library(ggplot2)
  library(grid)
  data &lt;- read.csv(file = "People.csv", header = T, sep = ",", dec = ".", check.names = F, na.strings=c("NA", "-", "?"))
  data2 &lt;- data[,-1]
  rownames(data2) &lt;- data[,1]
  data2 &lt;- scale(data2, center = T, scale = apply(data2, 2, sd))
  data2.pca &lt;- rda(data2)
  </code></pre>
  
  <p>Which gives me a list I can plot using the basic "plot" and "biplot" function, but I am at a loss as to how to plot both PCA and biplot in ggplot. I would also like to color the data points by group, e.g. sex. Any help would be great.</p>