I am new to more radical programming in R. I am trying to write a nested 'for' loop to produce output that takes subscripts like:

for i taking values 1,2,3,4,5 and 
    j taking values 1,2,3

I want to output for a computation using the combination values of i and j a value x like this;

i   j    x
1  1   x11
1  2   x12
1  3   x13
2  1   x21
 2  2   x22
 2  3   x23
3  1   x31
 3  2   x32
 3  3   x33
........
.......

Need help urgently.

Thanks.

Philip


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