Orange
Growth of Orange Trees
Description
Data on five orange trees grown at Riverside, California.
Measurements of the trunk circumference (in millimeters) were made on
each of the trees at 7 different times. The times are given relative
to the arbitrary origin of December 31, 1968.
Usage
Orange
Value
This data frame contains the following columns:
| Tree |
a factor indicating the tree on which the measurement is made.
|
| age |
the date of the measurement in days since December 31, 1968.
|
| circumference |
the circumference of the tree trunk (mm). This is probably the
standard forestry measurement of trunk circumference at breast
height.
|
Source
These data are quoted in Draper and Smith (1981), Applied Regression
Analysis, Wiley, New York (chapter 10, exercise N, page 524).
See Also
Examples
Orange.2 <- Sdatasets::Orange[Sdatasets::Orange$Tree == 4, ]
nls(circumference ~ SSlogis(age, Asym, T50, scal), data=Orange)