--- On Wed, 2/9/09, Herve STOLOWY wrote:
> I get the matrix m1 with the following command:
>
> statsmat foreign_rel, s(N mean) by(year_d2) mat(m1), if
> treatment==1
>
> m1[2,2]
> N
> mean
> 0 379 .18760868
> 1 484 .31070169
>
> I would like to reshape this matrix to get everything
> in one line:
>
> N mean N Mean
> 0/1 379
> .18760868 484 .31070169.
>
> It is possible?
>
> I found the rowshape command but don't know how to use it.
> I understood that it is based on Mata but never used Mata. I
> tried something:
>
> mata
> rowshape (m1,2)
>
> but get an error message: <istmt>: 3499
> m1 not found.
You have to get that matrix into Mata using the -st_matrix()-
command (and you can get that matrix back into Stata using
the same command). See the example below:
*------------- begin example --------------
sysuse auto, clear
statsmat mpg, s(N mean) by(foreign) mat(m1)
mata
m1 = st_matrix("m1")
m1 = rowshape (m1,1)
st_matrix("m1", m1)
end
matrix list m1
*------------- end example ------------------
( For more on how to use examples I sent to statalist see:
http://www.maartenbuis.nl/stata/exampleFAQ.html )
Hope this helps,
Maarten
PS. For others who want to use this code: -statsmat-
is a user written program by Nick Cox and Kit Baum
which is downloadable from SSC by typing in Stata:
-ssc install statsmat-.
--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany
http://www.maartenbuis.nl
--------------------------
*
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