R help - Dec 2011 - contingency table

Hello,

I want to create contingency table. The data which should be presented in
contingency table look like this.(Its a very long list. I am copying small
part of it)

obs1    obs2    exp1     exp2

3           8          725      875
0           0           58        70
3           7          435      525
10         7          754      910
0           1          145     175

the table should be like this.
----------|-----------|
obs1    | obs2    |
----------|-----------|
exp1    |  exp2   |
-----------------------


I have tried to use ftable function. But it didn't work. Please help me.

Regards
Reena 

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This is my list.
obs1    obs2    exp1     exp2

3           8          725      875
0           0           58        70
3           7          435      525
10         7          754      910
0           1          145     175

and i want result in contingency table as

obs       3                8
exp    725          875

next table will be

obs    0         0
exp   58       70

and so on... 

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