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anadat:cs:exercises:cv5

First ordination - PCA

  1. Run PCA on Hellinger transformed species data.
  2. Find the proportion of variance captured by the first two PC. hint
  3. Use Kaiser-Guttman kriterion and broken stick model to find the number of axes to keep. hint
  4. Draw an ordination biplot focused on distances among samples. Use different symbols to distinguish groups from exercise 4 clustering. Eclose these groups into envelopes. In the diagram, keep only a reasonable number of species (about 20) with best fit. hint
anadat/cs/exercises/cv5.txt · Last modified: 2017/04/18 17:16 by vitek