These Led Matrices are really easy to understand. Have you seen the picture of the schematics in the link you posted? The negative sides of each led in a row are connected together. The same with the positive side, all the leds in a column are connected together. So, let's say you want to light up the led in the 3rd column and the 2nd row, what do you do? You conect the 3rd column to the negative, and the 2nd row to the positive. That simple!
Now, some thinkering. What are the restrictions that this kind of design imposes?
A tip: the solution to overcome the problem, is the use of the POV (google it!).
Hope this helps you! Sorry about my english... trying to improve it!