| dgorange {datana} | R Documentation |
Diameter growth of Orange trees
Description
Growth diameter measurements for Orange trees. Notice that columns site and specie are fictitious and are only created for academic purposes.
Usage
data(dgorange)
Format
A time series data containing the following columns:
- tree.id
an ordered factor indicating the tree on which the measurement is made. The ordering is according to increasing maximum diameter.
- time
a numeric vector giving the numbers of days since 1968/12/31
- girth
a numeric vector of trunk perimeter (mm). This is probably a circumference at breast height, a standard measurement in forestry.
- dbh
a numeric vector of diameter at breast height (mm).
- site
a factor variable, representing site conditions with two levels.
- spp
a factor variable, representing tree species with three levels.
Source
The data come from the dataframe 'Orange' of the 'datasets' package, but some columns were created for academic reasons only.
Examples
data(dgorange)
coplot(dbh ~ time | tree.id, data = dgorange, show.given = FALSE)
plot(dbh ~ time, data = dgorange, subset = tree.id == 3,
xlab = "Time (number of days since 1968/12/31)",
ylab = "Tree diameter (mm)", las = 1)