data.frame

data.frame(x=1:10, y=rnorm(10))
    x          y
1   1  0.6316979
2   2 -0.4628356
3   3 -0.4986430
4   4  1.8248174
5   5  0.5844556
6   6  0.1596932
7   7 -0.5358325
8   8  0.4914142
9   9 -1.6644419
10 10 -1.1093526

See Also

reshape, reshape melt, reshape cast