Hello,

Can someone give me hint to change a data.frame.
I want to split a column in more columns depending on the value of a other
column.
Thanks for the reaction,
Andre

Example:
> dat
  x1 x2
1  1  a
2  1  b
3  1  c
4  2  d
5  2  e
6  2  f
7  3  g
8  3  h
9  3  i

in

> dur
  d1 d2 d3
1  a  d  g
2  b  e  h
3  c  f  i

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