R/int2.R

In cwhmisc: Miscellaneous Functions for Math, Plotting, Printing, Statistics, Strings, and Tools

str2dig <- function(str) {
  ops <- options(warn = -1)
  on.exit(options(ops))
  as.numeric( unlist(strsplit(str, NULL)) )
}

NdM <- function(x, B=10) max( Nd(x, B))
  
int2ASCII <- function(n) {
  return(ASCII[n %% 256])
}

int2B <- function( n, B=10, space, plus=lead, lead="",just=c("left",
    "right","center","none") ) {
    just <- match.arg(just)
  res <- r2B( n, B, plus = plus, lead = lead, just = just)
  names(res) <- names( n )
  return ( res )
}

int2Oct <- function( n ) {
  int2B( n,8)
}

int2Hex <- function( n ) {
  int2B( n,16)
}

strRound <- function( str, digits = getOption("digits"), B=10) {
  if ( B==10 ) { res <- round( as.numeric( str ), digits )
  } else {
    stopifnot(is.character(str))
    str <- sub(" ", "", str)
    x1 <- substring( str,1,1)
    str <- substring( str,2)
    Sign <- ifelse ( x1 == "-", -1, 1 )
    ddot <- cpos( str, "." )
    if ( is.na(ddot) ) ddot <- nchar(str) + 1
    nddig <- nchar(str) - ddot
#    catE("ddot")
    if ( is.na(ddot) ) nddig <- 0
    str <- sub("\\.","",str)
    D <- as.numeric( unlist( strsplit(str,"") ) )  #CF[1:(ddot + digits)]
    E <- D[1:min(ddot-1+digits, length(D))]
    sum <- 0
    for (kk in  seq_along(E) ) {
      sum <-  sum*B + E[kk]
    } # kk
#    x <- abs(x) + 0.5*B ^ (-digits)
    F <- B ^ min( digits, nddig )
    roun <- ddot+digits <= length(D)
    res <- Sign*trunc( sum + (if(roun) D[ddot+digits]/B else 0) + 0.5 ) / F
  } #else
  return( res )
}