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From |
Matthew White <mwhite@poverty-action.org> |

To |
statalist@hsphsun2.harvard.edu |

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 <richard.c.herron@gmail.com> 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/

**References**:**st: "Correct" way to convert a vector into a matrix***From:*Richard Herron <richard.c.herron@gmail.com>

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