| psptime {datana} | R Documentation |
Remeasurements of a permanent sample plot in a radiata pine plantation (Chile).
Description
Annual remeasurements of trees within a 1600 m^{2} permanent sample plot established in a radiata pine
plantation in Chile. Besides, the trees location are available. The plot is square (40 m × 40 m), and
if a tree is found dead, the column dead=1.
Usage
data(psptime)
Format
The data frame contains the following columns:
- plot.no
plot id
- tree.no
tree id
- dbh
Diameter at breast-height, in cm.
- year
Measurement year.
- x
Cartesian position at the X-axis, in m.
- y
Cartesian position at the Y-axis, in m.
- dead
if the tree is dead,this column is equal to 1, and 0 otherwise.
Source
Data were obtained from the files available at https://zenodo.org/record/7341482.
References
Pommerening A, Trincado G, Salas-Eljatib C, Burkhart H. 2023. Understanding and modelling the dynamics of data point clouds of relative growth rate and plant size. Forest Ecology and management Volume 529, 1206525 doi:10.1016/j.foreco.2022.120652
Examples
data(psptime)
head(psptime)
tapply(psptime$dbh,psptime$year,mean)
library(lattice)
histogram(~dbh|as.factor(year), data=psptime)