Measures of association, Concordant and Discordant

I want to calculate concordant and discordant pairs on nx2 tables.

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Value1, Value2

0.3434 , 1
0.2132 , 2
0.3 , 3.3245
0.6 , 0.12321
0.745234, 523
4 , 0.2134
3 , 111
x , a
y , b
z , c
........
......
......
This is a n x 2 table. How can I calculate concordant and discordant pairs? I am sorry I can't find suitable question tag.