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alter data in column

 
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Old 04-02-2009
alter data in column
Hello All,

I want to alter the first column of a dataset, say,

Code:
 
001 0.700 100.000
002 0.715 99.998
003 0.730 99.998
004 0.744 99.975
005 0.759 99.916
011 0.847 97.987 
012 0.861 97.317 
020 0.978 87.789
021 0.993 86.400
022 1.008 84.904
023 1.022 83.014
100 2.148 11.426
101 2.162 11.146

such that it reads

Code:
 
1.0 0.700 100.000
2.0 0.715 99.998
3.0 0.730 99.998
4.0 0.744 99.975
5.0 0.759 99.916
11.0 0.847 97.987 
12.0 0.861 97.317 
20.0 0.978 87.789
21.0 0.993 86.400
22.0 1.008 84.904
23.0 1.022 83.014
100.0 2.148 11.426
101.0 2.162 11.146

in other words, all numbers in the first column are changed from integer to floating by removing zeros if it is a first character and adding a decimal point. Can someone shown me what syntax to use?

Thanks
 
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LEARN ABOUT MINIX

ppmtosixel

ppmtosixel(1)                                                 General Commands Manual                                                ppmtosixel(1)

NAME

       ppmtosixel - convert a portable pixmap into DEC sixel format

SYNOPSIS

       ppmtosixel [-raw] [-margin] [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as input.  Produces sixel commands (SIX) as output.  The output is formatted for color printing, e.g. for a DEC
       LJ250 color inkjet printer.

       If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled.  A printer control header and a color assignment table
       begin the SIX file.  Image data is written in a compressed format by default.  A printer control footer ends the image file.

OPTIONS

       -raw   If  specified,  each  pixel  will  be explicitly described in the image file.  If -raw is not specified, output will default to com-
              pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands.  A raw file is often an order  of  magni-
              tude larger than a compressed file and prints much slower.

       -margin
              If  -margin  is not specified, the image will be start at the left margin (of the window, paper, or whatever).  If -margin is speci-
              fied, a 1.5 inch left margin will offset the image.

PRINTING

       Generally, sixel files must reach the printer unfiltered.  Use the lpr -x option or cat filename > /dev/tty0?.

BUGS

       Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion.  If the original PPM maxval was
       greater  than  100,  rescaling  also reduces the image depth.  While the actual RGB values from the ppm file are more or less retained, the
       color palette of the LJ250 may not match the colors on your screen.  This seems to be a printer limitation.

SEE ALSO

       ppm(5)

AUTHOR

       Copyright (C) 1991 by Rick Vinci.

                                                                   26 April 1991                                                     ppmtosixel(1)