Growth of Orange Trees
Records of the growth of orange trees.
A categorical indicating on which tree the measurement is made. Ordering is according to increasing maximum diameter.
Age of the tree (days since 1968-12-31).
Trunk circumference (mm). This is probably “circumference at breast height”, a standard measurement in forestry.
The data are given in Box & Jenkins (1976). Obtained from the Time Series Data Library at http://www-personal.buseco.monash.edu.au/~hyndman/TSDL/.
Draper, N. R. and Smith, H. (1998). Applied Regression Analysis (3rd ed). New York: Wiley. (exercise 24.N).
Pinheiro, J. C. and Bates, D. M. (2000). Mixed-effects Models in S and S-PLUS. New York: Springer.
t = octave.dataset.Orange; # TODO: Port coplot to Octave # TODO: Linear model