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Top Forums Shell Programming and Scripting Change the i-th character of the j-th line Post 302955887 by f_o_555 on Wednesday 23rd of September 2015 07:07:54 AM
Old 09-23-2015
Change the i-th character of the j-th line

Hi,
I have a file like


Code:
#-----------------------------------
3                ! number of parameters of the polynome
0.00000e+00   0  ! fix=0) free=1 
1.03916e-03   1  ! fix=0) free=1 
0.00000e+00   0  ! fix=0) free=1 
3                ! number of parameters
2.16595e-05   0  ! fix=0) free=1 
0.00000e+00   0  ! fix=0) free=1 
0.00000e+00   0  ! fix=0) free=1

Is there a way to change the i-th character of the j-th line to a value that I specifiy?

In the case above I would like to change from 1 to 0 the character in the 15th column; but it can be anywhere in principle

Any help is appreciated,
Sarah
 

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aha(1)                                                           Ansi HTML Adapter                                                          aha(1)

NAME
aha - Ansi HTML Adapter SYNOPSIS
aha [options] [-f datei] DESCRIPTION
aha takes SGR-colored Input and prints W3C conform HTML-Code. aha reads the Input from a file or stdin and writes HTML-Code to stdout. OPTIONS
--help , -h , -? A help like this --black , -b Black Background and white "standard color" --pink , -p Pink Background --iso X , -i X Uses ISO 8859-X instead of utf-8. X must be 1..16 --title X , -t X Gives the html output the title --line-fix , -l Uses a fix for inputs using control sequences to change the cursor position like htop. It's a hot fix, it may not work with any pro- gram like htop. (See EXAMPLE) EXAMPLE
aha --help | aha --black --title "the awesome aha help"> aha-help.htm Creates an HTML file with the help of aha with black background colordiff oldfile.c newfile.c | aha > colordiff.htm Creates an HTML file with a colorful diff-output of two files "oldfile.c" and "newfile.c" with white background ls --color=always | aha --pink > ls.htm Creates an HTML file with a colorful ls-output with pink background. echo a | htop | aha --black --line-fix > htop.htm Creates an HTML file with the output of htop. You have to use --line-fix due the other new-line-commands htop uses. AUTHOR
Copyleft Alexander Matthes aka Ziz 2011 zizsdl@googlemail.com SEE ALSO
http://ziz.delphigl.com/tool_aha.php August 31, 2011 aha(1)
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