Hello all,
I have just started fidling with script. Can anyone please help me out with this question. I have a file that contains the below 4 lines of words
Abcd
Efgh
Ijkl
Mnop
The question is I want to add a line to the middle of these without using sed or awk. Can anyone bail me out... (4 Replies)
Hi All,
I need information on file handling in UNIX enviornment.
If in UNIX enviornment I have two process..
P1
P2
Both accessing the same file simultaneosuly(read operation)..
Suppose P1 opened the file in read mode first and started reading the file..
Then P2 opens the same file in... (5 Replies)
Hi All,
I have one CVS file, and doing some actions on it. I have removed some columns by
SWITCH: {
$column eq 'COL1' && do {next;};
$column eq 'COL2' && do {next;};
push(@columns, $column);
... (1 Reply)
Hi,
I am creating a progress bar for file upload for which I have CGI script which copies the data and depending on certain bytes it increments the progress bar. Here, I am writing the incremented value to a file which is read by Ajax at server end. However, here I want to ask that, is it... (18 Replies)
I have a txt file with several columns and i want to peform an operation on two columns and output it to a new txt file .
file.txt
900.00000 1 1 1
500.00000
500.00000
100000.000
4
4
1.45257346E-07 899.10834 ... (4 Replies)
Hi,
i need to copy contents from source to destination with a few conditions, Please helpme out.
Sample input file
$>cat testfile.txt
/a/b/c/d | /e/f/g/d (d can be either a file or directory)
my conditions are:
check if destination is valid and if its a file or directory
if its a... (5 Replies)
Hi,
I am new to Shell Scripting. I need the following help.
I have a file which is Ctrl +A delimited.I have to do the following validation
1. Header row second column should be having the SYSdate time stamp.(ddmmyyyyhhmiss) Need compare only sysdate. Time is not required.
2. ln Footer... (2 Replies)
Hi I have
the file has some formulas how to create a program (per, ksh, awk) which calculate the operation and put the result on other file
example
data of source file - this has separate by ";"... (5 Replies)
Hi All,
We have a Unix program in oracle when we run the program this connects to specified ftp and will get the file into local server.
We are facing a problem like when file writing operations is not completed, this program is getting the incomplete file.
Could anyone please help me... (2 Replies)
i have one file which contains data like the below
DE_CODE|AXXANY|APP_NAME|TELCO|LOC|NY
DE_CODE|AXXATX|APP_NAME|TELCO|LOC|TX
DE_CODE|AXXABT|APP_NAME|TELCO|LOC|BT
DE_CODE|AXXANJ|APP_NAME|TELCO|LOC|NJ
DE_CODE|AXXANJwt|APP_NAME|TELCO|LOC|WT
am going use a for loop or whole loop which will... (3 Replies)
Discussion started by: mail2sant
3 Replies
LEARN ABOUT DEBIAN
statistics::basic::variance
Statistics::Basic::Variance(3pm) User Contributed Perl Documentation Statistics::Basic::Variance(3pm)NAME
Statistics::Basic::Variance - find the variance of a list
SYNOPSIS
Invoke it this way:
my $variance = variance(1,2,3);
Or this way:
my $v1 = vector(1,2,3);
my $var = var($v1);
And then either query the values or print them like so:
print "The variance of $v1: $variance
";
my $vq = $var->query;
my $v0 = 0+$var;
Create a 20 point "moving" variance like so:
use Statistics::Basic qw(:all nofill);
my $sth = $dbh->prepare("select col1 from data where something");
my $len = 20;
my $var = var()->set_size($len);
$sth->execute or die $dbh->errstr;
$sth->bind_columns( my $val ) or die $dbh->errstr;
while( $sth->fetch ) {
$var->insert( $val );
if( defined( my $v = $var->query ) ) {
print "Variance: $v
";
}
# This would also work:
# print "Variance: $v
" if $var->query_filled;
}
METHODS
new()
The constructor takes a list of values, a single array ref, or a single Statistics::Basic::Vector as arguments. It returns a
Statistics::Basic::Variance object.
Note: normally you'd use the mean() constructor, rather than building these by hand using "new()".
query_mean()
Returns the Statistics::Basic::Mean object used in the variance computation.
_OVB::import()
This module also inherits all the overloads and methods from Statistics::Basic::_OneVectorBase.
AUTHOR
Paul Miller "<jettero@cpan.org>"
I am using this software in my own projects... If you find bugs, please please please let me know. :) Actually, let me know if you find it
handy at all. Half the fun of releasing this stuff is knowing that people use it.
OVERLOADS
This object is overloaded. It tries to return an appropriate string for the calculation or the value of the computation in numeric
context.
In boolean context, this object is always true (even when empty).
COPYRIGHT
Copyright 2012 Paul Miller -- Licensed under the LGPL
SEE ALSO perl(1), Statistics::Basic, Statistics::Basic::_OneVectorBase, Statistics::Basic::Vector
perl v5.14.2 2012-01-23 Statistics::Basic::Variance(3pm)