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Top Forums Shell Programming and Scripting Mean square root error from different files Post 302761023 by Tzeronone on Friday 25th of January 2013 03:26:38 AM
Old 01-25-2013
Mean square root error from different files

For example, I have files called A.txt and B.txt.
A.txt
Code:
#x yj
1 1
2 4
3 9
4 16
5 25
6 36
7 49
8 64
9 81
10 100

B.txt
Code:
#x ^yj
1 1 
2 8
3 27
4 64
5 125
6 216
7 343
8 512
9 729
10 1000

I would like to count the mean square root error, which has the formula exactly the same with the picture. Image

So far, I have this code to combine them:
Code:
#! /usr/bin/perl -w

use strict;

open FP1,"A.txt";
open FP2,"B.txt";
my ($l1,$l2);
while(1)
{
  $l1=<FP1>; chomp $l1;
  $l2=<FP2>; chomp $l2; 
  last unless(defined $l1 or defined $l2);
  print "$l1 $l2\n";
}
close FP2;
close FP1;

After it combine it will become this text file:
Code:
1 1 1 1
2 4 2 8
3 9 3 27
4 16 4 64
5 25 5 125
6 36 6 216
7 49 7 343
8 64 8 512
9 81 9 729
10 100 10 1000

The column#2 = yj and column#4 = ^yj. Any idea?
 

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httpindex(1)						      General Commands Manual						      httpindex(1)

NAME
httpindex - HTTP front-end for SWISH++ indexer SYNOPSIS
wget [ options ] URL... 2>&1 | httpindex [ options ] DESCRIPTION
httpindex is a front-end for index++(1) to index files copied from remote servers using wget(1). The files (in a copy of the remote direc- tory structure) can be kept, deleted, or replaced with their descriptions after indexing. OPTIONS
wget Options The wget(1) options that are required are: -A, -nv, -r, and -x; the ones that are highly recommended are: -l, -nh, -t, and -w. (See the EXAMPLE.) httpindex Options httpindex accepts the same short options as index++(1) except for -H, -I, -l, -r, -S, and -V. The following options are unique to httpindex: -d Replace the text of local copies of retrieved files with their descriptions after they have been indexed. This is useful to display file descriptions in search results without having to have complete copies of the remote files thus saving filesystem space. (See the extract_description() function in WWW(3) for details about how descriptions are extracted.) -D Delete the local copies of retrieved files after they have been indexed. This prevents your local filesystem from filling up with copies of remote files. EXAMPLE
To index all HTML and text files on a remote web server keeping descriptions locally: wget -A html,txt -linf -t2 -rxnv -nh -w2 http://www.foo.com 2>&1 | httpindex -d -e'html:*.html,text:*.txt' Note that you need to redirect wget(1)'s output from standard error to standard output in order to pipe it to httpindex. EXIT STATUS
Exits with a value of zero only if indexing completed sucessfully; non-zero otherwise. CAVEATS
In addition to those for index++(1), httpindex does not correctly handle the use of multiple -e, -E, -m, or -M options (because the Perl script uses the standard GetOpt::Std package for processing command-line options that doesn't). The last of any of those options ``wins.'' The work-around is to use multiple values for those options seperated by commas to a single one of those options. For example, if you want to do: httpindex -e'html:*.html' -e'text:*.txt' do this instead: httpindex -e'html:*.html,text:*.txt' SEE ALSO
index++(1), wget(1), WWW(3) AUTHOR
Paul J. Lucas <pauljlucas@mac.com> SWISH++ August 2, 2005 httpindex(1)
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