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#############################################################################
# Copyright (c) 2014 Mathieu Ribatet
# Copyright (c) 2022 Christophe Dutang => replace fitted to object
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the
# Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA
#
#############################################################################
##The return level plot for object of class ``mcpot''
retlev.mcpot <- function(object, opy, exi, main, xlab,
ylab, xlimsup, ...){
if(!inherits(object, "mcpot"))
stop("Use only with 'mcpot' objects")
loc <- object$threshold
scale <- object$param["scale"]
shape <- object$param["shape"]
data <- object$data
pat <- object$pat
if (missing(exi) || !is.numeric(exi) || !is.finite(exi))
exi <- fitexi(data, loc)$exi
pot.fun <- function(T){
p <- 1 - 1 / T
q <- (1 - p^(1/opy/exi)) / pat
q <- loc - scale / shape * (1 - q^(-shape))
return(q)
}
if (missing(opy)){
warning("Argument ``opy'' is missing. Setting it to 365.25.")
opy <- 365.25
}
if (missing(main)) main <- 'Return Level Plot'
if (missing(xlab)) xlab <- 'Return Period (Years)'
if (missing(ylab)) ylab <- 'Return Level'
if (missing(xlimsup)) xlimsup <- 500
eps <- 10^(-3)
plot(pot.fun, from = 1 + eps, to = xlimsup, log = "x",
xlab = xlab, ylab = ylab, main = main, ...)
invisible(pot.fun)
}
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