#' @title S4 Class Definition for NPSForveg
#'
#' @description An S4 class that contains the data from forest monitoring from a set of forest montoirng plots. This will typcially be a single park, but it could be any group of plots, including part of a park or a group of parks.
#' @slot ParkCode A short code to designate the park (or group of plots), typically an NPS 4 letter code. Stored as a length 1 character vector.
#' @slot ShortName A short name for the park. Stored as a length 1 character vector.
#' @slot LongName A long, formal name for the park. Stored as a length 1 character vector.
#' @slot Network The code for the I&M network the park belongs to. Stored as a length 1 character vector.
#' @slot TPlotSize A length 2 numeric vector. The first element is the number of subplots where trees are monitored at each plot. The second element is the size of each of the subplots in meters squared.
#' @slot SapPlotSize A length 2 numeric vector. The first element is the number of microplots where saplings are monitored at each plot. The second element is the size of each of the microplots in meters squared.
#' @slot SeedPlotSize A length 2 numeric vector. The first element is the number of quadrats where seedlings are monitored at each plot. The second element is the size of each of the quadrats in meters squared.
#' @slot ShrubPlotSize length 2 numeric vector. The first element is the number of microplots where shrbus are monitored at each plot. The second element is the size of each of the microplots in meters squared.
#' @slot ShSeedPlotSize A length 2 numeric vector. The first element is the number of quadrats where shrub seedlings are monitored at each plot. The second element is the size of each of the quadrats in meters squared.
#' @slot VPlotSize A length 2 numeric vector. The first element is the number of subplots where vines on trees are monitored at each plot. The second element is the size of each of the subplots in meters squared.
#' @slot HPlotSize A length 2 numeric vector. The first element is the number of quadrats where herbaceous plants are monitored at each plot. The second element is the size of each of the quadrats in meters squared. Note - these need not be actually herbaceous plants, but it is assumed that cover of each species is measured rather than the dbh or height.
#' @slot Cycles A data.frame which indicates the year when each sampling cycle starts and ends, and gives each cycle a name suitable for display in graphs etc.
#' @slot Plots a data.frame with information on the plots
#' @slot Events a data.frame with information on each sampling event
#' @slot Trees a data.frame with tree data
#' @slot Saplings a data.frame with sapling data
#' @slot Seedlings a data.frame with seedling data
#' @slot Shrubs a data.frame with shrub data
#' @slot ShSeedlings a data.frame with shrub seedling data
#' @slot Vines a data.frame with vine data
#' @slot Herbs a data.frame with herbaceous plant data
#' @slot CWD a data.frame with coarse woody debris volume by species and decay class data
#' @slot Commons a data.frame which links common names to Latin names
#'
#' @exportClass NPSForVeg
setClass(Class="NPSForVeg", ### Name of the Class
slots=c(ParkCode="character", ### NPS Park Code
ShortName="character", ### Useful short name for park
LongName="character", ### Formal long name for park
Network="character", ### Code for I&M Network
TPlotSize="numeric", ### Number and area of the plots where trees are sampled in m^2
SapPlotSize="numeric", ### Number and area of the plots where saplilngs are sampled in m^2
SeedPlotSize="numeric", ### Number and area of the plots where tree seedings are sampled in m^2
ShrubPlotSize="numeric", ### Number and area of the plots where shrubs are sampled in m^2
ShSeedPlotSize="numeric", ### Number and area of the plots where shub seedings are sampled in m^2
VPlotSize="numeric", ### Number and area of the plots where vines are sampled in m^2
HPlotSize="numeric", ### Number and area of the plots where herbs are sampled in m^2
Cycles="data.frame", ### Data.frame with info on which years correspond to which sampling cycles
Plots="data.frame", ### Data.frame with plot information
Events="data.frame", ### Data.farme with event information
Trees="data.frame", ### Data.frame with tree data
Saplings="data.frame", ### Data.frame with sapling data
Seedlings="data.frame", ### Data.frame with tree seedling data
Shrubs="data.frame", ### Data.frame with shrub data
ShSeedlings="data.frame", ### Data.frame with shrub seeling data
Vines="data.frame", ### Data.frame with vines on trees data
Herbs="data.frame", ### Data.frame with herbaceous/ground cover data
CWD="data.frame", ### Data.frame with coarse woody debris volume by species data
Commons="data.frame" ### Data.frame with Latin and common names
),
### The prototype makes sure the correct sort of missing data is used when one of the slots is empyty
prototype = list(ParkCode=character(),
ShortName=character(),
LongName=character(),
Network=character(),
TPlotSize=numeric(),
SapPlotSize=numeric(),
SeedPlotSize=numeric(),
ShrubPlotSize=numeric(),
ShSeedPlotSize=numeric(),
VPlotSize=numeric(),
HPlotSize=numeric(),
Cycles=data.frame(),
Plots=data.frame(),
Events=data.frame(),
Trees=data.frame(),
Saplings=data.frame(),
Seedlings=data.frame(),
Shrubs=data.frame(),
ShSeedlings=data.frame(),
Vines=data.frame(),
Herbs=data.frame(),
CWD=data.frame(),
Commons=data.frame()
)
)
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