Subtracting array elements

[stevenrhiggins]

I have two arrays that I use to display monthly forecasts and actuals. The arrays are made up of elements of a mysql row.

I use foreach to iterate through them and show them one above the other.

print"<tr>";

foreach ($foresales as $fore) {

print"<td class='charts'>$fore</td>";

	}

print"</tr><tr>";

foreach ($sales as $value) {

print"<td class='charts'>$value</td>";

	}

print"</tr>";

Now I want to show the difference between each of the array elements to display the difference in forecast vs actual.

Forecast 123 124 145
Actual 111 124 145

---

difference here

Any thoughts?

[mistcat]

on the best way to do it?

Well if both arrays are the same length you could do the following:

for($i=0;$i<sizeof($myarray);$i++) {
$forcastString .= "<td class='charts'>$forcast[$i]</td>";
$actualString .="<td class='charts'>$acutal[$i]</td>";
$diffString .= "<TD>".($forecast[$i]-$actual[$i])."<\TD>";

}
print $forcastString . "</TR><TR>" . $actualString . "</TR><TR>" . $diffString . "</TR>";

You know?

[stevenrhiggins]

That did it. Thanks Nate.