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

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: concatenating column vectors |

Date |
Sat, 31 Dec 2011 11:04:45 +0000 |

This looks like elementwise division of a matrix by a row vector and as such is supported directly by Mata. No loop needed. . mata : y = (1,2,3\4,5,6\7,8,9) : x = (1,2,3) : y :/ x 1 2 3 +-------------------+ 1 | 1 1 1 | 2 | 4 2.5 2 | 3 | 7 4 3 | +-------------------+ Nick On Fri, Dec 30, 2011 at 7:48 AM, Nick Cox <njcoxstata@gmail.com> wrote: > Show us the code you tried that produced an error. > > Nick > > On Fri, Dec 30, 2011 at 7:31 AM, Jason Park <loooooo.j8311@gmail.com> wrote: >> I want to calculate something for each column and concatenate them >> into a matrix. >> For a 3x3 matrix, for example, it can be done as follows: >> matrix Q=uu`i' /* this is directly from the code I'm using, In >> fact, I'm trying to modify a code provided by an individual*/ >> matrix Z=vecdiag(Q) >> matrix P=(Q[1...,1]/Z[1,1],Q[1...,2]/Z[1,2],Q[1...,3]/Z[1,3]) >> And I want to generalized this to NxN case, with and without using a >> loop both (since it looks like the use of a loop conflicts with some >> other part of the code, hence generates an error). >> How can this be done? Please advise. * * 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: concatenating column vectors***From:*Jason Park <loooooo.j8311@gmail.com>

**Re: st: concatenating column vectors***From:*Nick Cox <njcoxstata@gmail.com>

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