R/SGP-class.R

In SGP: Student Growth Percentiles & Percentile Growth Trajectories

setClassUnion("list.null", c("list","NULL"))

setOldClass(c('data.frame'))
setOldClass(c('data.table', 'data.frame'))
setClass("SGP", representation(Data="data.table", Data_Supplementary="list.null", Names="list.null", SGP="list.null", Summary="list.null", Version="list.null"))

.Valid.SGP <- function(object) {
	out <- NULL
	
	## RUN A SET OF CHECKS ON THE SPECIFIED VARIABLES TO ENSURE THAT THE
	## SCORES ARE WITHIN ACCEPTABLE LIMITS AND THE VARIABLES HAVE THE
	## PROPER VARIABLE TYPE

	if (is.null(out)) out <- TRUE
	return(out)
	
}
setValidity("SGP", .Valid.SGP)