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
SSlogis, nls.
Examples

    Orange.2 <- Sdatasets::Orange[Sdatasets::Orange$Tree == 4, ]
    nls(circumference ~ SSlogis(age, Asym, T50, scal), data=Orange)

Package Sdatasets version 6.1.5-18
Package Index