06-03-2009
Re: Can't locate object method "fetchrow_array" Error
Hey Rawat,
As far as I know, the fetchrow_array is used with the statement handle ($sth) rather than database handle ($dbh). Try to differentiate $dbh and $sth, and put $sth in the appropriate places.
Let me know if that works out!!
Regards,
Kuks
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LEARN ABOUT DEBIAN
statistics::basic::median
Statistics::Basic::Median(3pm) User Contributed Perl Documentation Statistics::Basic::Median(3pm)
NAME
Statistics::Basic::Median - find the median of a list
SYNOPSIS
Invoke it this way:
my $median = median(1,2,3);
Or this way:
my $v1 = vector(1,2,3);
my $med = median($v1);
And then either query the values or print them like so:
print "The median of $v1: $med
";
my $mq = $med->query;
my $m0 = 0+$med;
Create a 20 point "moving" median like so:
use Statistics::Basic qw(:all nofill);
my $sth = $dbh->prepare("select col1 from data where something");
my $len = 20;
my $med = median()->set_size($len);
$sth->execute or die $dbh->errstr;
$sth->bind_columns( my $val ) or die $dbh->errstr;
while( $sth->fetch ) {
$med->insert( $val );
if( defined( $m = $med->query ) ) {
print "Median: $m
";
}
# This would also work:
# print "Median: $med
" if $med->query_filled;
}
METHODS
new()
The constructor takes a single array ref or a single Statistics::Basic::Vector as arguments. It returns a Statistics::Basic::Median
object.
Note: normally you'd use the median() constructor, rather than building these by hand using "new()".
_OVB::import()
This module also inherits all the overloads and methods from Statistics::Basic::_OneVectorBase.
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).
AUTHOR
Paul Miller "<jettero@cpan.org>"
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::Median(3pm)