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01272010, 02:27 AM

#1

Senior Member
Registered: Jun 2008
Location: Germany
Distribution: Slackware
Posts: 1,448
Rep:

Calculating Average in PHP Array?
Guys,
I need help with array in php. All I was having the following columns:
Code:
Time 4 6 7 10 11 avg 4 6 7 10 11 avg
Now Like the Above there were more variables defined through script:
Code:
$cols = array(
array(0,1),
array(1,1),
array(2,1),
array(3,1),
array(4,1),
array(5,1),
array(6,1),
array(0,16),
array(1,16),
array(2,16),
array(3,16),
array(4,16),
array(5,16),
array(6,16),
array(0,19),
array(1,19),
array(2,19),
array(3,19),
array(4,19),
array(5,19),
array(6,19),
array(7,2),
array(8,2),
array(9,2),
array(10,2),
array(11,2),
array(7,23),
array(8,23),
array(9,23),
array(10,23),
array(11,23),
array(7,24),
array(8,24),
array(9,24),
array(10,24),
array(11,24),
array(7,25),
array(9,25),
array(11,2),
array(7,23),
array(8,23),
array(9,23),
array(10,23),
array(11,23),
array(7,24),
array(8,24),
array(9,24),
array(10,24),
array(11,24),
array(7,25),
array(9,25),
array(10,25),
array(11,25),
);
echo '<tr><td>'.date('d/m/y H:i:').(date('s')<30?'00':'30').'</td>';
$last_col = 0;
$sum = 0;
$count = 0;
foreach ( $cols as $col ) {
$count++;
if ($col[1]<>$last_col) {
if ($last_col>0) {
printf('<td>%0.2f</td>',$sum/$count);
}
$last_col=$col[1];
$count = 0;
$sum = 0;
}
$sum += $data[$col[0]+1][$col[1]];
echo '<td>'.$data[$col[0]+1][$col[1]].'</td>';
}
printf('<td>%0.2f</td>',$sum/$count);
echo "</tr>\n";
exit;
}
Now what the above code is doing is calculating average of above values from columns{1?,4?)..likewise
Say If I remove two Machine and calculate the avg.
How Gonna I do that??



01272010, 05:19 AM

#2

Senior Member
Registered: Nov 2005
Location: Hanoi
Distribution: Fedora 13, Ubuntu 10.04
Posts: 2,379
Rep:

I think that you need to explain you problem a little more:
What does the array signify, I can see that it is an array of arrays but that doesn't mean anything to me?
What is you expected output?
What do you mean by remove a machine?
Also looking at the code what is the variable $data?



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