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anadat:cs:exercises:cv1

Data exploration and distance matrix calculation

We will start with data exploration while using chironomid data collected from the Svratka River.

  1. Import the species and environmetnal data.
  2. Check the distribution of environmental variables and transform if necessary. hint
  3. Check the relationships among environmental variables. hint
  4. Check the distribution of species abundances, look for possible mistakes and correct them if they are mistakes. hint
  5. Calculate distance matrices from the species data for the following distance coefficients:
    1. Euclidaen on ln(x+1) transformed data
    2. Hellinger distance
    3. Bray-Curtis distance on ln(x+1) transformed data hint
  6. Compare these distance matrices using scatter plots. Which distances are more related given the data? hint
anadat/cs/exercises/cv1.txt · Last modified: 2017/04/15 12:02 by vitek