php, DB and arrays

Hi evryone....i have a problem that i hope you can help me with. Here it goes! I have two arrays returned from my DB one called "y" adn one called "v" Togeather they hold a year(Y) and a value(V) The return from the DB looks like this: v: 10 20 40 60 320 780 890 920 y: 2002 2002 2002 2002 2002 2003 2003 2003 --------- Y represents a climping value A represents the year of the value -------------------------------- So the values 10, 20, 40, 60, 320 etc. grows until a new year is reachet. And then it schould start again in the new year. So MAXIMUM ONE VALUE per year.... How can i make it return this out of the earlier menchent array : (Arrays) Y: 2002 2003 V: 320 920 So much thanks people....i tried now for two days and i just can't come up with anything... P.S. Sorry for my bad english!