not correct function calcMaxLengthAfterDot. Example:

~ php -a
Interactive shell

php > include "include/graphs.inc.php";
php > echo calcMaxLengthAfterDot(array("215 G")) . "\n";
1
php > echo calcMaxLengthAfterDot(array("46 G","46.5 G")) . "\n";
0
php > quit

In the first case the value should be 0, in the second case - 1.