How to plot graph for coverage area [closed]

I have a two data set files data1 and data2 each containing 5000 points having 3 columns representing x,y(coordinate (centroid)),angular movement(theta) resepectively for two robot movements obtained by numerical programming and solution of a circuit representing robot equations.I need to simulate a graph for coverage with obstacle and without obstacle in a grid like fashion and then calculate the percentage of coverage where A is the coverage for each cell, A(i)=1 if cell i is covered otherwise 0. I went through this link SO but the answer is too obscure and I cannot follow. Can somebody please tell me how to generate these two graphs?Thank you

closed as off-topic by Jason R, jonsca, sansuiso, Peter K.♦, janAug 18 '13 at 16:30

This question appears to be off-topic. The users who voted to close gave this specific reason:

• "This question does not appear to be about signal processing within the scope defined in the help center." – jonsca, sansuiso, Peter K.
If this question can be reworded to fit the rules in the help center, please edit the question.

• Wut? Can you please try to reword the question? – lxop Apr 7 '13 at 20:56
• Reframed the question, please have a look. – user1142671 Apr 8 '13 at 0:25