NDSELECT

NAME

ndselect − select lines and fields for numdiff

DESCRIPTION

Usage: ndselect −h|−−help|−v|−−version or

ndselect [−b N][−e N][−s N][−F N][−L N][−I N][−S IFS][−D DELIMS][−O OSEP][−x][−l PATH][−o PATH] [FILE]

Print to standard output a subset of lines and fields from a given file.

The argument after the options is the name of the file to read from. The complete path of the file should be given, a directory name is not accepted. If no input file is specified, the program reads from the standard input.

Exit status: 0 in case of normal termination, −1 (255) in case of error

−b, −−beginning, −−start=N

Set to N the number of the first line to print (The default behavior is to start with line number 1)

−e, −−end=N

Set to N the number of the last line that can be printed (The default behavior is to arrive till to the end of the file)

−s, −−step=N

Set to N the increment to use when selecting the lines to print (The default value for the increment is 1)

−F, −−first−field=N

Set to N the number of the first field to print (The default behavior is to start with field number 1)

−L, −−last−field=N

Set to N the number of the last field that can be printed (The default behavior is to arrive till to the end of every line)

−I, −−increment=N

Set to N the increment to use when selecting the fields to print (The default value for the increment is 1)

−S, −−separators=IFS

Specify the set of characters to use as delimiters while splitting the input lines into fields (The default set of delimiters is space, tab and newline)

−D, −−delimiters=DELIMS

Specify the set of strings to use as delimiters while splitting the input lines into fields (The default set of delimiters is space, tab and newline)

−O, −−output−separator=OSEP

Specify the string to use as separator while writing the selected fields to the standard output (The default behavior consists in reusing

the delimiters found in the input lines)

−x, −−omit−empty−lines

Do not print empty lines

−l, −−warnings−to=PATH

Redirect warning and error messages from stderr to the indicated file

−o, −−output=PATH

Redirect output from stdout to the indicated file

−h, −−help

Show this help message

−v, −−version

Show version number, Copyright, Distribution Terms and NO−Warranty

COPYRIGHT

Copyright © 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 Ivano Primi <ivprimi AT libero DOT it> License GPLv3+: GNU GPL version 3 or later, see <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

The full documentation for ndselect is maintained as a Texinfo manual. If the info and ndselect programs are properly installed at your site, the command

info numdiff

should give you access to the complete manual.