R/dec2base.R

Defines functions dec2hex dec2base

Documented in dec2base dec2hex

##
## Copyright (c) 2010, 2011, Brandon Whitcher
## All rights reserved.
## 
## Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are
## met:
## 
##     * Redistributions of source code must retain the above copyright
##       notice, this list of conditions and the following disclaimer. 
##     * Redistributions in binary form must reproduce the above
##       copyright notice, this list of conditions and the following
##       disclaimer in the documentation and/or other materials provided
##       with the distribution.
##     * Neither the name of Rigorous Analytics Ltd. nor the names of
##       its contributors may be used to endorse or promote products 
##       derived from this software without specific prior written 
##       permission.
## 
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
## HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
##
## $Id: $
##

dec2base <- function(n, base, len=0) {
  symbols <- c(as.character(0:9), LETTERS)
  max.len <- max(trunc(log(max(n, 1)) / log(base)) + 1, len)
  ## determine digits for each number
  power <- rep(1, length(n)) * base^((max.len-1):0)
  n <- n * rep(1, max.len)
  digits <- floor((n %% (base * power)) / power)
  ## convert digits to symbols
  paste(symbols[digits + 1], collapse="")
}

dec2hex <- function(n, len=0) {
  dec2base(n, 16, len)
}

Try the oro.dicom package in your browser

Any scripts or data that you put into this service are public.

oro.dicom documentation built on May 31, 2017, 4:26 a.m.