How to get textures/sprites from Atlas and use it ?

HI,

I would like to use atlas in a mobile game, but i don’t really understand how to use it.

I’ve tried to use Resources.Load but didn’t manage to get the sprite needed.

If someone can help me, maybe i’m not using the good method, doc isn’t really clear about 2D Atlas

This one could help you : http://unity3d.com/learn/tutorials/modules/beginner/2d/sprite-editor