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Top Forums Shell Programming and Scripting Column operation : cosne and sine operation Post 302451670 by shashi792 on Tuesday 7th of September 2010 05:37:38 PM
Old 09-07-2010
Question Column operation : cosne and sine operation

I have a txt file with several columns and i want to peform an operation on two columns and output it to a new txt file .

file.txt
Code:
900.00000               1           1           1
   500.00000    
   500.00000    
  100000.000    
      4
      4
  1.45257346E-07   899.10834       67.780083      -3.0000000       6.9356270          0      4
  3.36595804E-07   854.32300       67.787216      -2.0000000      -5.6963296          0      4
  4.59328561E-07   764.32300       67.784538       2.0000000      -3.8667135          0      4
  8.10901852E-08   809.10840       67.784058       3.0000000       5.9845576          0      4

I want to consider the first column from line 7
i= complex number exp(ix)= cosx +i sinx , pi =3.14


Code:
operation = 1.45257346E-07 * exp (899.10834 * i * pi/180)

general expression = (first column number) * exp (second column number *  i * 0.0174)

 

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JSON_PP(1)						 Perl Programmers Reference Guide						JSON_PP(1)

NAME
json_pp - JSON::PP command utility SYNOPSIS
json_pp [-v] [-f from_format] [-t to_format] [-json_opt options_to_json] DESCRIPTION
json_pp converts between some input and output formats (one of them is JSON). This program was copied from json_xs and modified. The default input format is json and the default output format is json with pretty option. OPTIONS
-f -f from_format Reads a data in the given format from STDIN. Format types: json as JSON eval as Perl code -t Writes a data in the given format to STDOUT. null no action. json as JSON dumper as Data::Dumper -json_opt options to JSON::PP Acceptable options are: ascii latin1 utf8 pretty indent space_before space_after relaxed canonical allow_nonref allow_singlequote allow_barekey allow_bignum loose escape_slash -v Verbose option, but currently no action in fact. -V Prints version and exits. EXAMPLES
$ perl -e'print q|{"foo":"XX","bar":1234567890000000000000000}|' | json_pp -f json -t dumper -json_opt pretty,utf8,allow_bignum $VAR1 = { 'bar' => bless( { 'value' => [ '0000000', '0000000', '5678900', '1234' ], 'sign' => '+' }, 'Math::BigInt' ), 'foo' => "x{3042}x{3044}" }; $ perl -e'print q|{"foo":"XX","bar":1234567890000000000000000}|' | json_pp -f json -t dumper -json_opt pretty $VAR1 = { 'bar' => '1234567890000000000000000', 'foo' => "x{e3}x{81}x{82}x{e3}x{81}x{84}" }; SEE ALSO
JSON::PP, json_xs AUTHOR
Makamaka Hannyaharamitu, <makamaka[at]cpan.org> COPYRIGHT AND LICENSE
Copyright 2010 by Makamaka Hannyaharamitu This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.18.2 2018-08-17 JSON_PP(1)
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