The solution sort of work / not work, the problem is if there is no match, then xargs does a full listing. That is if it found file/s that matches the search string and hence file exist, it does list the files but if it doesn't find a match it do a full listing instead
See example below:
And just realized I can just actually just do ls -l but it gave me the same behaviour:
I guess this is the expected behavior but kinda hoping it'll just do nothing if it doesn't find any or print something maybe instead? Any suggestion?
Hi,
I have a file which is a result of a script running every two minutes. What I wanted to do is to grep a specific date and time (hour and minute) from the file and then count the occurance of 201. I need to get the result of occurance of 201 every 5 minutes. What should I include in my... (8 Replies)
Hi,
I'm trying to accomplish the following and would like some suggestions or possible bash script examples that may work
I have a directory that has a list of log files that's periodically dumped from a script that is crontab that are rotated 4 generations. There will be a time stamp that is... (4 Replies)
I've seen several examples of grep showing the filename the string was found in, but what I really need is grep to show the file details in long format (like ls -l would).
scenario is:
grep mobile_number todays_files
This will show me the string I'm after & which files they turn up in, but... (2 Replies)
Hi,
I have a log file without date/time, and I want that everytime tail|grep find something it displays the date/time and the line. I have tried something like this command but without any luck to display the date/time:
tail -F catalina.out | sed "s/^/`date `/" | egrep ... (6 Replies)
Hi All,
Need a small help. I have a log file which keeps updating for every Minute with multiple number of lines. I just want to grep few properties which has latest Date and Time to it. How do i do it?
I wanted to grep a property by name "Reloading cache with a maximum of" from the... (4 Replies)
how can i grep a range?
i have a text file with the following text:
result.log.00:2012/01/02 12:00:07.422 LOG STARTED HERE
N6Kashya29MemoryShieldScheduler_AO_IMPLE, pid=8662/8658,
config=(alertThreshold=10,alertLevel=0,killThreshold=7200,coreThreshold=0,full=1),
deltaTime=0,... (1 Reply)
Hi guys,
This is probably very easy but I've no idea how to pull this out.
Basically, I need to find errors into a very large logfile. When you grep the ID, the output is like this:
+- Type: 799911 Code: Ret: 22728954 Mand: X Def: Des: UserDes: SeqNo: 2
+- Type: 799911 Code: Ret:... (5 Replies)
I've got a job that finds and removes trace files based upon an access time of more than seven days (I've also tried a modify date).
find TABC* -atime +7 -exec rm +
find TABC* -mtime +7 -exec rm +
Whether I use -atime or -mtime, the process seems to work sporadically. Sometimes it removes... (6 Replies)
I am using grep as follows
grep --include \*.org -ir "sunspot" -C 3 ./astron_aphys/solarsy/sun/helioseism/localhs/fhankel/
This gives me the filename for each matched line. How can I change the command to print the file name only once rather than having the same file name repeated at... (2 Replies)
Hi all,
I have many files included time information, some of them included time range by 30 minutes;
2007-12-27T110000.txt
2007-12-27T120000.txt
2007-12-27T130000.txt
2007-12-27T150000.txt
2007-12-27T153000.txt
2007-12-28T000000.txt
2007-12-28T003000.txt
I only want to echo that... (5 Replies)
Discussion started by: jeo_fb
5 Replies
LEARN ABOUT DEBIAN
statistics::test::sequence
Statistics::Test::Sequence(3pm) User Contributed Perl Documentation Statistics::Test::Sequence(3pm)NAME
Statistics::Test::Sequence - Sequence correlation test for random numbers
SYNOPSIS
use Statistics::Test::Sequence;
my $tester = Statistics::Test::Sequence->new();
$tester->set_data( [map {rand()} 1..1000000] );
my ($metric, $actual_freq, $expected_freq) = $tester->test();
use Data::Dumper;
print "$metric
";
print "Frequencies:
";
print Dumper $actual_freq;
print "Expected frequencies:
";
print Dumper $expected_freq;
DESCRIPTION
This module implements a sequence correlation test for random number generators. It shows pairwise correlation between subsequent random
numbers.
The algorithm is as follows: (Following Blobel. Citation in SEE ALSO section.)
o Given "N+1" random numbers "u_j".
o For all "j", compare "u_j" with "u_j+1". If "u_j" is greater then "u_j+1", assign a 0-Bit to the number. Otherwise, assign a 1-Bit.
o Find all sequences of equal Bits. For every sequence, increment a counter for the length "k" of that sequence. (Regardless of whether
it's a sequence of 1's or 0's.)
o For uncorrelated random numbers, the number of sequences N(k) of length "k" in the set of "N+1" random numbers is expected to be:
N(k) = 2*((k^2+3*k+1)*N - (k^3+3*k^2-k-4)) / (k+3)!
METHODS
new
Creates a new random number tester.
set_data
Sets the random numbers to operate on. First argument must be either an array reference to an array of random numbers or a code reference.
If the first argument is a code reference, the second argument must be an integer "n". The code reference is called "n"-times and its
return values are used as random numbers.
The code reference semantics are particularily useful if you do not want to store all random numbers in memory at the same time. You can
write a subroutine that, for example, generates and returns batches of 100 random numbers so no more than 101 of these numbers will be in
memory at the same time. Note that if you return 100 numbers at once and pass in "n=50", you will have a sequence of 5000 random numbers.
test
Runs the sequence test on the data that was previously set using "set_data".
Returns three items: The first is the root mean square of the bin residuals divided by the number of random numbers. It could be used as a
measure for the quality of the random number generator and should be as close to zero as possible. A better metric is to compare the
following two return values.
The second return value is a reference to the array of frequencies. An example is in order here. Generating one million random numbers, I
get:
[0, 416765, 181078, 56318, 11486, 1056, 150]
This means there were no sequences of length 0 (obvious), 416765 sequences of length 1, etc. There were no sequences of length 7 or
greater. This example is a bad random number generator! (It's a linear congruent generator with "(a*x_i+c)%m" and "a=421", "c=64773",
"m=259200", and "x_0=4711").
The third return value is similar in nature to the second in that it is a reference to an array containing sequence length frequencies.
This one, however, contains the frequencies that would be expected for the given number of random numbers, were they uncorrelated. The
number of bins has the maximum length of an occurring sequence as an upper limit. In the given example, you would get: (Dumped with
Data::Dumper)
$VAR1 = [
'0',
'416666.75',
'183333.1',
'52777.64722222222222222222222222222222222',
'11507.89523809523809523809523809523809524',
'2033.72068452380952380952380952380952381',
'303.1287808641975308641975308641975308642',
# ...
];
Note that where I put in a "# ...", you would really see a couple more lines of numbers until the numbers go below an expected frequency of
0.1. For "n=1000000" and "k=7", you get about 39 sequences, "k=8" is expected to be found 4-5 times, etc.
SUBROUTINES
expected_frequency
Returns the expected frequency of the sequence length "k" in a set of "n" random numbers assuming uncorrelated random numbers.
Returns this as a Math::BigFloat.
Expects "k" and "n" as arguments.
This subroutine is memoized. (See Memoize.)
faculty
Computes the factulty of the first argument recursively as a Math::BigFloat. This subroutine is memoized. (See Memoize.)
SEE ALSO
Math::BigFloat, Memoize, Params::Util
Random number generators: Math::Random::MT, Math::Random, Math::Random::OO, Math::TrulyRandom, "/dev/random" where available
The algorithm was taken from: (German)
Blobel, V., and Lohrmann, E. Statistische und numerische Methoden der Datenanalyse. Stuttgart, Leipzig: Teubner, 1998
AUTHOR
Steffen Mueller, <smueller@cpan.org>
COPYRIGHT AND LICENSE
Copyright (C) 2007 by Steffen Mueller
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.6 or, at
your option, any later version of Perl 5 you may have available.
perl v5.10.0 2007-01-05 Statistics::Test::Sequence(3pm)