Comparing arrays confusion

I am having trouble properly comparing a couple of arrays. (Actually three arrays) Class array Array ( [] => Active / Semiconductor [1] => Cable & Wire [2] => Enclosure [3] => Relay & Solenoid [4] => Industrial Control [5] => Audio, Warning, Video, & Security [6] => Connectors [7] => Cable Assembly [8] => Power Supplies [9] => Buyout / Specials ) Subclass array Array ( [] => Passive Component [1] => Optoelectronic [2] => Connectors [3] => Boards/Printed Circuit Board (PCB) [4] => Thermal Management ) Percentages arrayArray ( [] => 0.13 [1] => 2.22 [2] => 32.35 [3] => 15.58 [4] => 0.17 [5] => 18.32 [6] => 1.29 [7] => 0.11 [8] => 16.89 [9] => 11.88 ) The class array and the subclass array are the first comparison that I'm doing to produce; Intersect arrayArray ( [6] => Connectors ) Now I have the difference; Intersect difference arrayArray ( [] => Passive Component [1] => Optoelectronic [3] => Boards/Printed Circuit Board (PCB) [4] => Thermal Management ) What I want to do from here is to associate the intersection of the two arrays with the percentage array; Intersect combined arrayArray ( [Connectors] => 1.29 ) Then have the remaining array members from the subclass array display with a 0 value. I have created an associative array with the class and subclass arrays. How do I display the subclass array with the value from the percentages array on the intersection of the subclass and class? alex hogan ****************************************************************** The contents of this e-mail and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom it is addressed. The views stated herein do not necessarily represent the view of the company. If you are not the intended recipient of this e-mail you may not copy, forward, disclose, or otherwise use it or any part of it in any form whatsoever. If you have received this e-mail in error please e-mail the sender. ******************************************************************