H
ello,
Did you read ?data.frame and ?expand.grid.
> data.frame(x=1:2, y=1:2)
x y
1 1 1
2 2 2
> expand.grid(x=1:2, y=1:2)
x y
1 1 1
2 2 1
3 1 2
4 2 2
There is a small difference, isn't it?
Regards,
Pascal
2013/6/28 Zhaoran Zhou <zhaoran1...@gmail.com>
> Hello everyone,
>
> i found that both of the 2 functions ("expand.grid" and "data.frame") can
> be used to produce data frame. are there any difference between them?
>
> thanks for your help!
>
> zhaoran
>
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>
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