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Full Discussion: Question about awk command
Homework and Emergencies Homework & Coursework Questions Question about awk command Post 302939608 by Akshay Hegde on Friday 27th of March 2015 03:12:58 AM
Old 03-27-2015
Quote:
Originally Posted by ramkumar15
hi gurus,


I am not sure what the below commands does.

Code:
 
awk 'BEGIN {sum=0} {sum=sum+$5} END {print sum}' input_file


Code:
awk '   # Run awk with the following script...
BEGIN {
               # variable sum is set with a value 0
               sum=0      
} 

# File reading starts from here, read line by line...

{

  # You can also use sum+=$5 it is just a shorthand/shortcut
  # What below expression does is that it first adds the value stored in variable sum to column5 value from your file,
  # and then stores the total of the two back to the variable sum

  sum=sum+$5   

} 


END{
       # After all lines have been read from all input files given to
       # this invocation of awk, run the commands in this section.

      # Finally print sum here
      print sum
}
 ' input_file  # End the script and specify the input file(s) to be processed by this

Last edited by Akshay Hegde; 03-27-2015 at 04:22 AM..
 

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LEARN ABOUT CENTOS

set_color

set_color(1)							       fish							      set_color(1)

NAME

       set_color - set_color - set the terminal color

set_color - set the terminal color
   Synopsis
       set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR]

   Description
       Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple,
       cyan, white and normal.

       o -b, --background Set the background color

       o -c, --print-colors Prints a list of all valid color names

       o -h, --help Display help message and exit

       o -o, --bold Set bold or extra bright mode

       o -u, --underline Set underlined mode

       o -v, --version Display version and exit

       Calling set_color normal will set the terminal color to whatever is the default color of the terminal.

       Some terminals use the --bold escape sequence to switch to a brighter color set. On such terminals, set_color white will result in a grey
       font color, while set_color --bold white will result in a white font color.

       Not all terminal emulators support all these features. This is not a bug in set_color but a missing feature in the terminal emulator.

       set_color uses the terminfo database to look up how to change terminal colors on whatever terminal is in use. Some systems have old and
       incomplete terminfo databases, and may lack color information for terminals that support it. Download and install the latest version of
       ncurses and recompile fish against it in order to fix this issue.

Version 1.23.1							  Sun Jan 8 2012						      set_color(1)
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