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UNIX for Dummies Questions & Answers
Find difference between two files
Post 302429042 by jagadish_gaddam on Friday 11th of June 2010 08:00:25 PM
06-11-2010
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Hola,
Tengo un texto texto1.txt con el siguiente contenido:
Malaga
Cadiz
Sevilla
Hola
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Hi,
The requirement is to compare two files that has single column of records each. Comparison is to happen on a whole and not line by line.
File1.txt
314589929
315611087
304924413
315989094
301171509
302984393
315609549
314593632
File2.txt
315611087
304924413
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File 1:
SK TEST NAME MATHS PHYSICS
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Hi , i am newbie to shell scripting and am trying to do the below job,
A shell script to be run with a command like
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Consider the delimiter would be Tab or comma
File 1:
SK TEST NAME MATHS PHYSICS
21 1 AAA... (1 Reply)
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---------- Post updated at 05:00 PM ---------- Previous update was at 04:50 PM ----------
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LEARN ABOUT DEBIAN
pnmpsnr
pnmpsnr(1) General Commands Manual pnmpsnr(1) NAME
pnmpsnr - compute the difference between two portable anymaps SYNOPSIS
pnmpsnr [pnmfile1] [pnmfile2] DESCRIPTION
Reads two PBM, PGM, or PPM files, or PAM equivalents, as input. Prints the peak signal-to-noise ratio (PSNR) difference between the two images. This metric is typically used in image compression papers to rate the distortion between original and decoded image. If the inputs are PBM or PGM, pnmpsnr prints the PSNR of the luminance only. Otherwise, it prints the separate PSNRs of the luminance, and chrominance (Cb and Cr) components of the colors. The PSNR of a given component is the ratio of the mean square difference of the component for the two images to the maximum mean square difference that can exist betwee any two images. It is expressed as a decibel value. The mean square difference of a component for two images is the mean square difference of the component value, comparing each pixel with the pixel in the same position of the other image. For the purposes of this computation, components are normalized to the scale [0..1]. The maximum mean square difference is identically 1. So the higher the PSNR, the closer the images are. A luminance PSNR of 20 means the mean square difference of the luminances of the pixels is 100 times less than the maximum possible difference, i.e. 0.01. SEE ALSO
pnm(5) 04 March 2001 pnmpsnr(1)