

   trees {base}                                 R Documentation

   GGiirrtthh,, HHeeiigghhtt aanndd VVoolluummee ffoorr BBllaacckk CChheerrrryy TTrreeeess

   DDeessccrriippttiioonn::

        This data set provides measurements of the girth,
        height and volume of timber in 31 felled black cherry
        trees.  Note that girth is the diameter of the tree at
        4 ft 6 in above the ground.

   UUssaaggee::

        data(trees)

   SSoouurrccee::

        T. A. Ryan, B. L. Joiner and B. F. Ryan (1976).  The
        Minitab Student Handbook. Duxbury Press.

   RReeffeerreenncceess::

        A. C. Atkinson (1985).  Plots, Transformations and
        Regression.  Oxford University Press.

   EExxaammpplleess::

        data(trees)
        pairs(trees, panel = panel.smooth, main = "trees data")
        plot(Volume ~ Girth, data = trees, log = "xy")
        coplot(log(Volume) ~ log(Girth) | Height, data = trees,
               panel = panel.smooth)
        summary(fm1 <- lm(log(Volume) ~ log(Girth), data = trees))

