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Re: st: "Correct" way to convert a vector into a matrix
From
Matthew White <[email protected]>
To
[email protected]
Subject
Re: st: "Correct" way to convert a vector into a matrix
Date
Fri, 23 Dec 2011 11:34:11 -0500
Hi Richard,
Looks like a job for Mata to me:
matrix temp_vector = (1, 2, 3, 4, 5, 6, 7, 8, 9)
mata: st_matrix("temp_matrix", rowshape(st_matrix("temp_vector"),
sqrt(cols(st_matrix("temp_vector"))))')
matrix list temp_matrix
Best,
Matt
On Fri, Dec 23, 2011 at 11:21 AM, Richard Herron
<[email protected]> wrote:
> I would like to convert a vector, which I think is really a row matrix
> in Stata, into a square matrix. I have a loop solution that works, but
> it seems too awkward to be the "correct" approach. Is there a one (or
> two) line solution? I found a lot of matrix functions regarding
> diagonals, but none that wrap a vector into a matrix.
>
> In this case -svar- provides the long-run restriction matrix as a
> vector where entries are down columns, then across rows.
>
> * begin code
> matrix temp_vector = (1, 2, 3, 4, 5, 6, 7, 8, 9)
> matrix temp_matrix = J(3, 3, 0)
> foreach i of numlist 1/3 {
> foreach j of numlist 1/3 {
> scalar temp_scalar = `= `j' - 1' * 3 + `i'
> matrix temp_matrix[`i', `j'] = el(temp_vector, 1, temp_scalar)
> }
> }
> matrix list temp_matrix
> * end code
>
> Thanks!
> *
> * For searches and help try:
> * http://www.stata.com/help.cgi?search
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
--
Matthew White
Data Coordinator
Innovations for Poverty Action
101 Whitney Avenue, New Haven, CT 06510 USA
+1 434-305-9861
www.poverty-action.org
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/