[R] how to merge several data sets?

[Peter Dalgaard]

Cunningham Kerry <kerryrekky at yahoo.com> writes:

> Dear R-helpers,
>   I want to merge several data sets into one single data set. For example, there are three separate data sets like:
....
> There is also one difficulty that the order of id may be different for the three sets and the order ot time may be different for Set 2 and Set 3.
>  
> Is there a convenient function in R to perform this operation? Thank you for your attention.

How about this?

> merge(merge(d1,d2),d3)
  id time age gender   x1   x2
1  1    1  12      M 0.25 0.34
2  1    2  12      M 0.27 0.55
3  1    3  12      M 0.29 0.79
4  3    1  15      F 0.15 0.12
5  3    2  15      F 0.18 0.23
6  4    2  19      M 0.22 0.45
7  4    3  19      M 0.54 0.56


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   O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
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