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Full Discussion: how to make an average value every 128lines?
Top Forums Shell Programming and Scripting how to make an average value every 128lines? Post 302276610 by summer_cherry on Wednesday 14th of January 2009 08:05:52 AM
Old 01-14-2009
just replace a.txt with your file and assign $line to your number 128 or whatever, then below script should help you.

Code:
#!/usr/bin/perl
$line=8;
open FH,"<a.txt";
while(<FH>){
	my @tmp=split("-",$_);
	$n+=$tmp[1];
	if ( $. % $line == 0){
		print $tmp[0]," : ",$n/$line,"\n";
		$n=0;
	}
	$pre=$tmp[0] unless $pre;
}
print $pre," : ",$n/($. % $line) if $. % $line;

 

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LEARN ABOUT CENTOS

grub2-mkrescue

GRUB-MKRESCUE(3)					     Library Functions Manual						  GRUB-MKRESCUE(3)

NAME

       grub-mkrescue -- Generate a GRUB rescue image using GNU Xorriso.

SYNOPSIS

       grub-mkrescue [-o | --output=FILE] [--modules=MODULES]
		      [--install-modules=MODULES] [--themes=THEMES]
		      [--fonts=FONTS] [--locales=LOCALES]
		      [--compress[=no,xz,gz,lzo]] [-d | --directory=DIR]
		      [--grub-mkimage=FILE] [--rom-directory=DIR]
		      [--xorriso=FILE] [--grub-glue-efi=FILE]
		      [--grub-render-label=FILE] [--label-font=FILE]
		      [--label-color=COLOR] [--label-bgcolor=FILE]
		      [--product-name=STRING] [--product-version=STRING]
		      [--sparc-boot] [--arcs-boot]

DESCRIPTION

       grub-mkrescue can be used to generate a rescue image with the GRUB bootloader.

OPTIONS

       --output=FILE
	      Write the generated file to FILE.  The default is to write to standard output.

       --modules=MODULES
	      Pre-load modules specified by MODULES.

       --install-modules=MODULES
	      Install only MODULES and their dependencies.  The default is to install all available modules.

       --themes=THEMES
	      Install THEMES.  The default is to install the starfield theme, if available.

       --fonts=FONTS
	      Install FONTS.  The default is to install the unicode font.

       --locales=LOCALES
	      Install only locales listed in LOCALES.  The default is to install all available locales.

       --compress[=no,xz,gz,lzo]
	      Compress GRUB files using the specified compression algorithm.

       --directory=DIR
	      Use images and modules in DIR.

       --grub-mkimage=FILE
	      Use FILE as grub-mkimage(1).  The default is /usr/bin/grub-mkimage.

       --rom-directory=DIR
	      Save ROM images in DIR.

       --xorriso=FILE
	      Use FILE as xorriso.

       --grub-glue-efi=FILE
	      Use FILE as grub-glue-efi(3).

       --grub-render-label=FILE
	      Use FILE as grub-render-label(3).

       --label-font=FILE
	      Use FILE as the font file for generated labels.

       --label-color=COLOR
	      Use COLOR as the color for generated labels.

       --label-bgcolor=COLOR
	      Use COLOR as the background color for generated labels.

       --product-name=STRING
	      Use STRING as the product name in generated labels.

       --product-version=STRING
	      Use STRING as the product version in generated labels.

       --sparc-boot
	      Enable booting the SPARC platform.  This disables HFS+, APM, ARCS, and "boot as disk image" on the i386-pc target platform.

       --arcs-boot
	      Enable  ARCS  booting.  This is typically for big-endian MIPS machines, and disables HFS+, APM, sparc64, and "boot as disk image" on
	      the i386-pc target platform.

       --     All options after a -- will be passed directly to xorriso's command line when generating the image.

SEE ALSO

       info grub

								  Wed Feb 26 2014						  GRUB-MKRESCUE(3)
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