Nothing
# this is to create a truncating distribution with varying truncation according to par
# not finished yet
trun.d <-function(par, family = "NO", type = c("left", "right", "both"), varying = FALSE, ...)
{
type <- match.arg(type)
fname <- family
if (mode(family) != "character" && mode(family) != "name")
fname <- as.character(substitute(family))
distype <- eval(call(family))$type
dfun <- paste("d",fname,sep="")
pfun <- paste("p",fname,sep="")
pdf <- eval(parse(text=dfun))
cdf <- eval(parse(text=pfun))
if (!varying)
{
if (type=="both" && length(par)!= 2) stop(paste("the length of par should be 2 \n"))
if (type!="both" && length(par)!= 1) stop(paste("the length of par should be 1 \n"))
#--
fun <- if (type=="left")
function(x, log = FALSE, ...)
{
if (distype=="Discrete" && any(x <= par))
stop(paste("x must be greater than ", par, "\n", ""))
if (distype!="Discrete" && any(x < par))
stop(paste("x must be greater or equal than ", par, "\n", ""))
dfun <- pdf(x,log = TRUE,...)-log(1-cdf(par,...))
dfun <- if (log == TRUE) dfun else exp(dfun)
dfun
}
else if (type=="right")
function(x, log = FALSE, ...)
{
if (distype=="Discrete" && any(x >= par))
stop(paste("x must be less than ", par, "\n", ""))
if (distype!="Discrete" && any(x > par))
stop(paste("x must be less or equal than ", par, "\n", ""))
dfun <- if (distype=="Discrete") pdf(x, log = TRUE,...)-log(cdf(par-1,...))
else pdf(x, log = TRUE,...)-log(cdf(par,...))
dfun <- if (log == TRUE) dfun else exp(dfun)
dfun
}
else if (type=="both")
function(x, log = FALSE, ...)
{
if (distype=="Discrete" && (any(x <= par[1]) || any(x >= par[2])) )
stop(paste("x must be greater than", par[1], "and less than", par[2],
"\n", ""))
if (distype!="Discrete" && (any(x < par[1]) || any(x > par[2])) )
stop(paste("x must be greater than", par[1], "and less or equal to", par[2],
"\n", ""))
dfun <- if (distype=="Discrete") pdf(x, log = TRUE,...) - log(cdf(par[2]-1,...)-cdf(par[1],...))
else pdf(x, log = TRUE,...) - log(cdf(par[2],...)-cdf(par[1],...))
dfun <- if (log == TRUE) dfun else exp(dfun)
dfun
}
}
else # this is for varying truncation only
{
# browser()
if (type=="both" && dim(par)[2]!= 2) stop(paste("the rows of par should be 2 \n"))
#--
fun <- if (type=="left")
function(x, log = FALSE, ...)
{
if (length(x)!=length(par))
stop(paste("length of x must be equal to ", length(par), "\n","" ))
if (distype=="Discrete" && any(x <= par))
stop(paste("x must be greater than the truncation parameters", "\n", ""))
if (distype!="Discrete" && any(x < par))
stop(paste("x must be greater or equal than ", par, "\n", ""))
dfun <- pdf(x,log = TRUE,...)-log(1-cdf(par,...))
dfun <- if (log == TRUE) dfun else exp(dfun)
dfun
}
else if (type=="right")
function(x, log = FALSE, ...)
{
if (length(x)!=length(par))
stop(paste("length of x must be equal to ", length(par), "\n" ))
if (distype=="Discrete" && any(x >= par))
stop(paste("x must be less than ", par, "\n", ""))
if (distype!="Discrete" && any(x > par))
stop(paste("x must be less or equal than ", par, "\n", ""))
dfun <- if (distype=="Discrete") pdf(x, log = TRUE,...)-log(cdf(par-1,...))
else pdf(x, log = TRUE,...)-log(cdf(par,...))
dfun <- if (log == TRUE) dfun else exp(dfun)
dfun
}
else if (type=="both")
function(x, log = FALSE, ...)
{
if (dim(par)[1]!= length(x))
stop(paste("the length of x should be the equal to ", dim(par)[1], "\n"))
if (distype=="Discrete" && (any(x <= par[,1]) || any(x >= par[,2])) )
stop(paste("x must be between the lower and uppper of the par argument",
"\n", ""))
if (distype!="Discrete" && (any(x < par[,1]) || any(x > par[,2])) )
stop(paste("x must be between the lower and uppper of the par argument",
"\n", ""))
dfun <- if (distype=="Discrete") pdf(x, log = TRUE,...) - log(cdf(par[,2]-1,...)-cdf(par[,1],...))
else pdf(x, log = TRUE,...) - log(cdf(par[,2],...)-cdf(par[,1],...))
dfun <- if (log == TRUE) dfun else exp(dfun)
dfun
}
}
fun
}
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