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From |
Nick Cox <njcoxstata@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: "Correct" way to convert a vector into a matrix |

Date |
Sun, 25 Dec 2011 11:59:22 +0000 |

Matt and Scott quite rightly advise using Mata here. For another historic solution, see -matvec- from STB-56. STB-56 dm79 . . . . . . . . . . . . . . . . . . Yet more new matrix commands (help matcorr, matewmf, matvsort, svmat2 if installed) . . N. J. Cox 7/00 pp.4--8; STB Reprints Vol 10, pp.17--23 commands to produce a correlation matrix, elementwise monadic function of another matrix, selected subsets of matrix rows and columns, vec or vech of a matrix, elements sorted within a vector, matrix from a vector, and commands to save matrices see mata matrix language incorporated into Stata 9.0 and for other such add-ons for Stata matrices STB-50 dm69 . . . . . . . . . . . . . . . . . . Further new matrix commands (help matdelrc, matewm, matmad, matpow if installed) . . . N. J. Cox 7/99 pp.5--9; STB Reprints Vol 9, pp.29--34 collection of new matrix commands providing additional matrix checking, management, element-wise operators, maximum absolute difference, and power STB-39 dm49 . . . . . . . . . . . . . . . . . . . . Some new matrix commands (help matfunc, varfunc if installed) . . . . . . . . . . . J. Weesie 9/97 pp.17--20; STB Reprints Vol 7, pp.43--48 collection of new matrix commands; several for explicit matrices and a few for implicit matrices (i.e., variables) see mata matrix language incorporated into Stata 9 Nick On Fri, Dec 23, 2011 at 4:45 PM, Richard Herron <richard.c.herron@gmail.com> wrote: > Thanks, Matt and Scott! I didn't realize it was so easy to move back > and forth between Mata and Stata. > > On Fri, Dec 23, 2011 at 11:35, Scott Merryman <scott.merryman@gmail.com> wrote: >> You can use mata's -rowshape- : >> >> clear* >> matrix temp_vector = (1, 2, 3, 4, 5, 6, 7, 8, 9) >> mata: st_matrix("x", rowshape( st_matrix("temp_vector")', 3) ) >> mat list x >> >> Scott >> >> >> On Fri, Dec 23, 2011 at 10:21 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 * * 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>

**Re: st: "Correct" way to convert a vector into a matrix***From:*Scott Merryman <scott.merryman@gmail.com>

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

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