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From | tshmak <tshmak@hku.hk> |
To | "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |
Subject | RE: st: -matamatrix- program available on SSC |
Date | Fri, 7 Jun 2013 09:31:44 +0800 |
Hi Sergiy, -matamatrix- is simply a shortcut to avoid having to invoke mata to do your calculations. (-matamatrix- invokes it for you.) This can make your codes look neater. It also avoids me having to type multiple lines of codes every time I want to do a simple calculation on a matrix, especially e(b) or e(V). However, as it says in the help file, you cannot combine Stata and Mata matrices in a call to -matamatrix-. In your example, there's nothing that -matamatrix- can do that standard -matrix- cannot. But you can do things like: matamatrix B = exp(A[1,]) :- 1 HTH, Tim -----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Sergiy Radyakin Sent: 07 June 2013 00:02 To: statalist@hsphsun2.harvard.edu Subject: Re: st: -matamatrix- program available on SSC Dear Timothy, could you please elaborate what does it do in comparison to standard st_matrix()? Thank you, Sergiy matrix A=1,2\3,4 mata st_matrix("A") B=2,3\5,8 B C=st_matrix("A")*B C end On Wed, Jun 5, 2013 at 9:59 PM, tshmak <tshmak@hku.hk> wrote: > <> > Thanks to Kit Baum, a program called -matamatrix- is available on SSC. It allows one to perform mata matrix manipulation and functions on Stata matrices. > > Enjoy! > > Timothy Mak > School of Public Health > The University of Hong Kong > > Tel 852 2819 9914 > Fax 852 2855 9528 > > > > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/faqs/resources/statalist-faq/ > * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/