[R] matrix from sequences

[Miha STAUT]

Hi all,

I have a data frame with sequences of x and y from a map. I would like to 
know it both ways:
1. How to make a matrix from that;
2. how to make a data frame of all points in a map.

Probably it is a silly question, but please tell me where to read about it 
or tell me how to do it.

Miha Staut