##### https://github.com/cran/nacopula

Revision

**161411bb86f97e5a8bd89091cd61d03a33c2761a**authored by Martin Maechler on**06 February 2012, 00:00:00 UTC**, committed by Gabor Csardi on**06 February 2012, 00:00:00 UTC****1 parent**5bc804b

Tip revision:

**161411bb86f97e5a8bd89091cd61d03a33c2761a**authored by**Martin Maechler**on**06 February 2012, 00:00:00 UTC****version 0.8-0** Tip revision:

**161411b** Auxiliaries.R

```
## Copyright (C) 2010 Marius Hofert and Martin Maechler
##
## 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 3 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, see <http://www.gnu.org/licenses/>.
#### 'interval' class utilities
#### =========================== these are small and simple
### use require(package= "Intervals") if you want serious interval "work"
interval <- function(ch) {
## Purpose: "interval" object constructor from string "[ a, b)", ...
## Author: Martin Maechler, Date: 16 Nov 2009
stopifnot(is.character(ch), length(ch) == 1L)
sp <- strsplit(ch, ", *")[[1]]
if(length(sp) != 2L) stop("'ch' must contain exactly one \",\"")
L <- gsub(" +", "", sp[1]); bL <- substr(L, 1,1)
if(!any(iL <- bL == c("(","[","]")))
stop("interval specification must start with \"[\", \"(\" or \"]\"")
R <- gsub(" +", "", sp[2]); nR <- nchar(R); bR <- substr(R, nR,nR)
if(!any(iR <- bR == c(")","]","[")))
stop("interval specification must end with \")\", \"]\" or \"[\"")
new("interval", as.numeric(c(substring(L, 2), substr(R, 1, nR-1))),
open = c(which(iL) != 2, which(iR) != 2))
}
##' Directly convert numeric (length 2) vector to closed interval
##'
##' @title Closed Interval from Numeric
##' @param x numeric vector of length two
##' @param open logical, of length one or two
##' @return
##' @author Martin Maechler
num2interval <- function(x, open = FALSE) {
stopifnot(is.numeric(x), length(x) == 2,
is.logical(open), 1 <= (lo <- length(open)), lo <= 2)
new("interval", as.numeric(x), open = rep(open, length.out=2)[1:2])
}
setAs("numeric", "interval", function(from) num2interval(from))
setMethod("format", "interval",
function(x, trim = TRUE, ...) {
r <- format(x@.Data, trim=trim, ...)
paste(if(x@open[1]) "(" else "[", r[1],", ", r[2],
if(x@open[2]) ")" else "]", sep="")
})
setMethod("show", "interval",
function(object) cat("'interval' object ", format(object), "\n",
sep=''))
##' Summary group method: range(), min(), max(), [sum(), prod(), any(), all()] :
setMethod("Summary", signature(x = "interval", na.rm = "ANY"),
function(x, ..., na.rm) callGeneric(x@.Data, ..., na.rm=na.rm))
setMethod("%in%", signature(x = "numeric", table = "interval"),
function(x, table) {
op <- table@open
(if(op[1]) `<` else `<=`)(table[1], x) &
(if(op[2]) `<` else `<=`)(x, table[2])
})
```

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