Raaj - 2015-03-17

I have a text file with two columns of tab separated data points. The first row has the title of each column. Or it looks like following example

x-values y-values
6 36
7 49
8 64
9 81

Now, I want to read only the numerical data in each column as an array so that I can assign a variable to each element in the column. By doing this I will be able to do any math with elements of my choice. For example I want to do x[2]*y[2] or (x[2]+y[3])/10, etc..
Could you please help me writing a code for this? Any helpful links will be appreciated. If you can please write a simple code for above example for me so that I can expand this to use for my actual text file with huge data.