hi
i need to select a few columns of two txt files and write it to a new file. there is one common field for both of these files.
plz help me in this
thanks in advance (4 Replies)
Hello!
I wan't to extract columns from two files and later combine them for plotting with gnuplot. If the files file1 and file2 look like:
fiile1:
a, 0.62,x
b, 0.61,x
file2:
a, 0.43,x
b, 0,49,x
The desired output is
a 0.62 0.62
b 0.61 0.49
Thank you in advance! (2 Replies)
Hi,
I want to select columns from multiple files and combine them in one file. The files are simulation-data-files with 23 columns each and about 50 rows. I now use:
cut -f 11 Sweep?wing-30?scale=0.?0?fan2?.txt | pr -3 | awk '{printf("\n%s\t%s\t%s",$1,$2,$3)}' > ../Data_Processed/output.txtI... (1 Reply)
Hi there!
I have the following problem:
I have a set of files called rates_op_yyyyddmm with the format below (which corresponds to the file rates_op_20090130)
30-JAN-2009,ED,FEB09,C,96.375,,,0,,,,,,2.375,,,,,,
30-JAN-2009,ED,FEB09,C,96.5,,,0,,,,,,2.25,,,,,,... (2 Replies)
Hi everyone,
I got a problem with merging files and hoped one of you would have an idea how to approach this issue. I tried it with awk, but didn't get far. This is what I have:
I got 40 files looking like the ones below. All have three columns but the number of rows differs (20000 to 50000).... (6 Replies)
Hi,
I have two text files that I would like to merge/join. I would like to join them if the first columns of both text files match and the second column of the first text file matches the third column of the second text file.
Example input:
First file:
1334 10 0 0 1 5.2
1334 12 0 0 1 4.5... (4 Replies)
Hi guys,
I have very basic linux experience so I need some help with a problem.
I have 3 files from which I want to extract columns based on common fields between them.
File1:
--- rs74078040 NA 51288690 T G 461652 0.99223 0.53611 3
--- rs77209296 NA 51303525 T G 461843 0.98973 0.60837 3... (10 Replies)
Hi,
I am facing issues while accomplishing below task.
We have two files Test1.txt and Test2.txt. We have to match 1st column of Test1.txt file with 2nd column of Test2.txt and then merge 2nd file with the 1st file. In the output we should select column 1 and 2 from the 1st file and column 1... (5 Replies)
Discussion started by: Prathmesh
5 Replies
LEARN ABOUT REDHAT
hash::util
Hash::Util(3pm) Perl Programmers Reference Guide Hash::Util(3pm)NAME
Hash::Util - A selection of general-utility hash subroutines
SYNOPSIS
use Hash::Util qw(lock_keys unlock_keys
lock_value unlock_value
lock_hash unlock_hash);
%hash = (foo => 42, bar => 23);
lock_keys(%hash);
lock_keys(%hash, @keyset);
unlock_keys(%hash);
lock_value (%hash, 'foo');
unlock_value(%hash, 'foo');
lock_hash (%hash);
unlock_hash(%hash);
DESCRIPTION
"Hash::Util" contains special functions for manipulating hashes that don't really warrant a keyword.
By default "Hash::Util" does not export anything.
Restricted hashes
5.8.0 introduces the ability to restrict a hash to a certain set of keys. No keys outside of this set can be added. It also introduces
the ability to lock an individual key so it cannot be deleted and the value cannot be changed.
This is intended to largely replace the deprecated pseudo-hashes.
lock_keys
unlock_keys
lock_keys(%hash);
lock_keys(%hash, @keys);
Restricts the given %hash's set of keys to @keys. If @keys is not given it restricts it to its current keyset. No more keys can be
added. delete() and exists() will still work, but will not alter the set of allowed keys. Note: the current implementation prevents the
hash from being bless()ed while it is in a locked state. Any attempt to do so will raise an exception. Of course you can still bless()
the hash before you call lock_keys() so this shouldn't be a problem.
unlock_keys(%hash);
Removes the restriction on the %hash's keyset.
lock_value
unlock_value
lock_value (%hash, $key);
unlock_value(%hash, $key);
Locks and unlocks an individual key of a hash. The value of a locked key cannot be changed.
%hash must have already been locked for this to have useful effect.
lock_hash
unlock_hash
lock_hash(%hash);
lock_hash() locks an entire hash, making all keys and values readonly. No value can be changed, no keys can be added or deleted.
unlock_hash(%hash);
unlock_hash() does the opposite of lock_hash(). All keys and values are made read/write. All values can be changed and keys can be
added and deleted.
AUTHOR
Michael G Schwern <schwern@pobox.com> on top of code by Nick Ing-Simmons and Jeffrey Friedl.
SEE ALSO
Scalar::Util, List::Util, Hash::Util
perl v5.8.0 2002-06-01 Hash::Util(3pm)