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Top Forums Shell Programming and Scripting Grep a string and count following lines starting with another string Post 302957676 by Syeda Sumayya on Wednesday 14th of October 2015 02:58:15 AM
Old 10-14-2015
Network Grep a string and count following lines starting with another string

I have a large dataset with following structure;

Code:
  C 0001 Carbon [C]
  D SAR001 methane [CH3]
  D SAR002 ethane
  D SAR003 propane
  D SAR004 butane
  D SAR005 pentane
  C 0002 Hydrogen [H]
  C 0003 Nitrogen [N]
  C 0004 Oxygen [O]
  D SAR011 ozone
  D SAR012 super oxide
  C 0005 Sulphur [S]
  D SAR013 Hydrogen Sulphide [H2S]
  D SAR014 Sulphuric acid
  .
  .
  .

In this dataset, lines starting with C are the headings and those with D are the components of their headings. I want to count the number of components in each heading and desires the output as;

Code:
0001 5
0002 0
0003 0
0004 2
0005 2
.
.
.

The pseudo code can be;

Code:
grep ^C
count next lines with ^D
print [$2 of ^C] and [count of ^D]
restart loop


Last edited by Scrutinizer; 10-14-2015 at 04:12 AM.. Reason: Code tags also for data samples
 

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PAPS(1) 						      General Commands Manual							   PAPS(1)

NAME
paps - UTF-8 to PostScript converter using Pango SYNOPSIS
paps [options] files... DESCRIPTION
paps reads a UTF-8 encoded file and generates a PostScript language rendering of the file. The rendering is done by creating outline curves through the pango ft2 backend. OPTIONS
These programs follow the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is included below. --landscape Landscape output. Default is portrait. --columns=cl Number of columns output. Default is 1. --font=desc Set the font description. Default is Monospace 12. --rtl Do rtl layout. --paper ps Choose paper size. Known paper sizes are legal, letter, a4. Default is A4. --bottom-margin=bm Set bottom margin in postscript points (1/72 inch). Default is 36. --top-margin=tm Set top margin. Default is 36. --left-margin=lm Set left margin. Default is 36. --right-margin=rm Set right margin. Default is 36. --help Show summary of options. --header Draw page header for each page. --markup Interpret the text as pango markup. --encoding=ENCODING Assume the documentation encoding is ENCODING. --lpi Set the lines per inch. This determines the line spacing. --cpi Set the characters per inch. This is an alternative method of specifying the font size. --stretch-chars Indicates that characters should be stretched in the y-direction to fill up their vertical space. This is similar to the texttops behaviour. AUTHOR
paps was written by Dov Grobgeld <dov.grobgeld@gmail.com>. This manual page was written by Lior Kaplan <kaplan@debian.org>, for the Debian project (but may be used by others). April 17, 2006 PAPS(1)
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