tst.bci90.full {CTFS} | R Documentation |
The structure of the CTFS Long Term Forest data set for all trees with census information from a single census including variable names, values for categorical variable and the contents of a test file for demonstration of functions.
data(tst.bci90.full)
A data frame with 12421 observations on the following 9 variables.
tst.bci90.full
and tst.bci95.full
are subsets of the
complete data files for BCI census 1990 and 1995, respectively.
tst.bci90.spp
, tst.bci90.quad
and tst.bci95.spp
,
tst.bci95.quad
are the same data as the *.full
files
restructured as a list of dataframes. For *.spp
each
data frame consists of the records of a single species. For
*.quad
each data frame consists of the record for a single
quadrate (20 x 20). The names on the list are the species names and
quadrate number, respectively. The *.quad
file is used for the
density dependent analysis. They are created using
sep.data
for *.spp
and
sep.vct.data
for for *.quad
files.
The variable codes
can have many different values which have
different meaning at each site. It is best not to use this variable
because of its inconsistency across sites.
Only three species are included in these test files: alsebl,
psycde, and socrex.
the species names and number of trees for each are:
alsebl:`data.frame': 11128 obs. of 9 variables:
psycde:`data.frame': 160 obs. of 9 variables:
socrex:`data.frame': 1133 obs. of 9 variables:
POM | Point of Measurement |
0 | at initial position |
1 | first change of POM |
2 ... | second to n change of POM |
STATUS | Values |
“A” | alive |
“AB” | alive but broken |
“AS” | alive but broken, used at the site Pasoh |
“D” | dead |
“P” | not yet large enough for measurement, future recruit |
NA | missing data, unknown cause |
Only trees with STATUS == “A” have valid dbh measurements. All other trees have a dbh = NA.
The Center for Tropical Forest Science
http://www.ctfs.si.edu
## Not run: data(tst.bci90.full) str(tst.bci90.full) data(tst.bci90.spp) str(tst.bci90.spp) ## End(Not run)