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#' Class ObsLulcRasterStack
#'
#' An S4 class for observed land use maps.
#'
#' @slot filename see \code{raster::\link[raster]{Raster-class}}
#' @slot layers see \code{raster::\link[raster]{Raster-class}}
#' @slot title see \code{raster::\link[raster]{Raster-class}}
#' @slot extent see \code{raster::\link[raster]{Raster-class}}
#' @slot rotated see \code{raster::\link[raster]{Raster-class}}
#' @slot rotation see \code{raster::\link[raster]{Raster-class}}
#' @slot ncols see \code{raster::\link[raster]{Raster-class}}
#' @slot nrows see \code{raster::\link[raster]{Raster-class}}
#' @slot crs see \code{raster::\link[raster]{Raster-class}}
#' @slot history see \code{raster::\link[raster]{Raster-class}}
#' @slot z see \code{raster::\link[raster]{Raster-class}}
#' @slot t numeric vector with timesteps corresponding to each observed map
#' @slot categories numeric vector of land use categories
#' @slot labels character vector corresponding to \code{categories}
#'
#' @export
#' @exportClass ObsLulcRasterStack
#' @rdname ObsLulcRasterStack-class
setClass("ObsLulcRasterStack",
contains = c("RasterStack",
"CategoryLabel"),
slots = c(t = "numeric"),
## categories = "numeric",
## labels = "character"),
validity = function(object) {
check1 <- (raster::nlayers(object) > 0)
if (!check1) stop("RasterStack contains no layers")
check2 <- (length(object@t) == raster::nlayers(object))
if (!check2) stop("timesteps do not correspond with maps")
check3 <- all(sort(unique(as.numeric(raster::getValues(object)))) %in% object@categories)
if (!check3) stop("unknown categories in maps")
check4 <- (length(object@categories) == length(object@labels))
if (!check4) stop("labels and categories have different lengths")
return(TRUE)
}
)
## setClass("ObsLulcRasterStack",
## slots = c(maps = "RasterStack",
## t = "numeric",
## ## total = "matrix",
## categories = "numeric",
## labels = "character"),
## validity = function(object) {
## check1 <- (raster::nlayers(object@maps) > 0)
## if (!check1) stop("RasterStack contains no layers")
## check2 <- (length(object@t) == raster::nlayers(object@maps))
## if (!check2) stop("timesteps do not correspond with maps")
## check3 <- all(sort(unique(as.numeric(raster::getValues(object@maps)))) %in% object@categories)
## if (!check3) stop("unknown categories in maps")
## check4 <- (length(object@categories) == length(object@labels))
## if (!check4) stop("labels and categories have different lengths")
## return(TRUE)
## }
## )
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