Nguyen Cong Minh wrote:
> But I don't know how to write a program can do this transformation and give
> me pd and Np into vector pd[.,1], Np[.,1],
> (in this example, pd[]=(1 2 3)' and Np[]=(2 1 2)').And how I can use
> pd[.,1], Np[.,1] to partition
> the whole transformed matrix [Id yr var1 var2 var3] into blocks(i) [Id yr
> var1 var2 var3] with rows = pd[i,1]*Np[i,1]?
I don't think you need any matrices or vectors. Can't you just make an
identifier variable in much the same way as you did before and use -if- to
identify the rows? Unless you are using mata, you definitely do not want to
store pd and Np in vectors, but rather in locals, but as I said that won't
be necessary anyhow.
Hope this helps,
Maarten
-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands
visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434
+31 20 5986715
http://home.fsw.vu.nl/m.buis/
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