# Re: st: Matrix help

 From "Data Analytics Corp." <[email protected]> To [email protected] Subject Re: st: Matrix help Date Wed, 21 May 2008 09:35:16 -0400

But doesn't

matrix rownames
set and reset the names? I want to retrieve them and use them as a variable in a new matrix that I want to append to yet another matrix.

Nick Cox wrote:

. . help matrix rownames
Nick
[email protected]
Data Analytics Corp.

I used the mat_rapp command this morning - worked perfectly, and saved me time. I have another question, if I may. How do you retrieve the row names and use them in the matrix M=J(n,m,value) command? Any examples of retrieving the names from, say, e(TR)?

matrix M=J(n,m,value) will create a matrix size nxm filled with value
"value".

you will need it to create the column identifying source.

mat_capp M : M1 M2 will stitch two matrices together taking columns
from M1 then from M2 and storing them in M. You will need it to put

mat_rapp M : M1 M2 will stitch two matrices together taking rows from
M1 them from M2 and storing them in M. . You will need it to combine
e(TR) and e(TC).

net search matrix save
will return a number of commands to export matrices. choose one that
produces output in a suitable format.

On 5/20/08, Data Analytics Corp. <[email protected]> wrote:

I just ran a simple correspondence analysis and I would now like to
export

the coordinates to another program In particular, I'd like to stack
the two

matrices of coordinates contained in e(TR) (which is R x J) and e(TC)
(which

is C x J) into one matrix, add a column identifying the source (with
values

say, a 1 for e(TR) and 2 for e(TC)), resulting in an (R + C) x (j +1)
matrix, and then export the matrix, with rownames, to an ASCII
comma-separated file. Can this be done and how?
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/

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--
________________________

Walter R. Paczkowski, Ph.D.
Data Analytics Corp.
44 Hamilton Lane
Plainsboro, NJ 08536
________________________
(V) 609-936-8999
(F) 609-936-3733
[email protected]
www.dataanalyticscorp.com

*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/
```