Keywords: Principal components
Dimensions in millimetres are given of two samples of jellyfish from Hawkesbury River in New South Wales, Australia. One of the samples came from Dangar Island and the other from Salamander Bay. The first column contains a "D" if the measurement came from Dangar Island and a "S" if it came from Salamander Bay. The dimensions measured were length and width. What can one learn from graphing the two principal components? Try graphing principal components of the logarithms of the measurements. Can the dimensions determine the location?
Data file (tab-delimited text)
|Lunn, A.D. and McNeil, D.R. (1991) Computer-Interface Data Analysis, Chichester: John Wiley & Sons, 308.|
|Hand D.J., Daly F., Lunn A.D., McConway K.J., Ostrowski E. (1994) A Handbook of Small Data Sets. London: Chapman & Hall. Data set 335.|