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Version 2.1.1  (2005-06-20), ISBN 3-900051-07-0

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>  # adjust.r                         J F Monahan, June 2001
>  #                                    revised    August 2007
>  # write positive number in d*2**i format 
>   adjust <- function(x) {
+      if( x <= 0 ) c( 0, -2**31 ) else {  # flag if not positive
+           i <- 0
+           while (x > 16 ) { 
+              x <- x/16
+              i <- i + 4
+                           }
+           while (x < 1 ) { 
+              x <- x*16
+              i <- i - 4
+                           }
+           c(x,i)
+                                       }
+                                       }
>  x <- c(13, -3, 128, .35, 257)     # vector of examples
>  di <-sapply(x,adjust)             # two rows of results
>  #
>  # write it out pretty
>  xdi <- paste( 'x', format(x), '= d*2**i ',format(di[1,]), format(di[2,]))
>  cat(xdi,sep="\n")
x  13.00 = d*2**i  13.000000           0
x  -3.00 = d*2**i   0.000000 -2147483648
x 128.00 = d*2**i   8.000000           4
x   0.35 = d*2**i   5.600000          -4
x 257.00 = d*2**i   1.003906           8
>                  
>  rm(list=ls())                     # clean up
>