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From |
"Nadeem Shafique" <nadeemshafique@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: RE: Adding Matrices generated from a loop |

Date |
Fri, 24 Aug 2007 18:16:19 +0500 |

Respected Nick Cox, Sorry for not providing complete information, I am trying it using Mata. Following is the code i am trying to execute. ******************************************************************************************** for (i=1; i<=rows(info); i++) { v_i = panelsubmatrix(v, i, info) m_i = panelsubmatrix(m,i,info) n_i = panelsubmatrix(s,i,info) n = mean(n_i) t_i=v_i*m_i*n } ****************** I want to sum all these t_i in one matrix say "t" ****************** ******************************************************************************************** Best Regards, Nadeem Shafique On 8/24/07, Nick Cox <n.j.cox@durham.ac.uk> wrote: > There may be subtleties here I am missing, but > I would initialise > > sum <- first_matrix > > and then loop over the other matrices > > sum <- sum + next_matrix > > This is pseudocode. > > Otherwise I can't tell what's troubling you about > this. As the details will depend on whether > you are using Stata or Mata, your naming structure, > what else you are doing with these matrices, > whether the number is predictable in advance, etc., > none of which is indicated, I'll leave it there. > > Nick > n.j.cox@durham.ac.uk > > Nadeem Shafique > > > I want to add several matrices (say K) of the same order, suppose the > > matrices to be added are comming from a loop, how can i calculate the > > following > > > > K > > Sum X_i > > i=1 > > where X_i is the ith Matix > > * > * 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/ > -- Nadeem Shafique Butt * * 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/

**Follow-Ups**:**RE: st: RE: Adding Matrices generated from a loop***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

**References**:**st: Adding Matrices generated from a loop***From:*"Nadeem Shafique" <nadeemshafique@gmail.com>

**st: RE: Adding Matrices generated from a loop***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

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