groupDBH: Group DBH values into Classes.
In Mensuration: Miscellaneous Forest Mensuration Routines

Description Usage Arguments Details Value Author(s) See Also Examples

This is used in conjunction with dbhClassLimits to simply group the raw diameters into class midpoints.

1	groupDBH(dbh, classLimits)

`dbh`	a vector of diameter values to be classed.
`classLimits`	A data frame with lower, mid and upper class limits from `dbhClassLimits`.

This just computes the diameter classes based on the midpoints of the class for all dbh values passed. If any diameters lie outside the chosen limits, they are marked as NA and a warning is issued.

A list with...

`dbh.grp`	A vector with midpoint diameter classes.
`idx`	A vector of the integer index values of each diameter in the class limits data frame.

JHG.

dbhClassLimits, or for a complete stand table along the lines of the example below, standTable.

lims = dbhClassLimits()
dbh = rexp(40, .25)      #some diameters
gd = groupDBH(dbh, lims)
rbind(gd$dbh.grp, dbh)
table(gd$dbh.grp)
dbhcl = factor(groupDBH(dbh, lims)$dbh.grp, levels=lims[,2])
as.data.frame(table(dbhcl))