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From | "Nick Cox" <n.j.cox@durham.ac.uk> |
To | <statalist@hsphsun2.harvard.edu> |
Subject | st: RE: AW: local vs. global macro MATA |
Date | Thu, 6 May 2010 12:39:28 +0100 |
I think that to get a better answer Samn needs to provide much more detail. My guess is that at a very low level global and local macro manipulation are closer than is obvious to users. In any case, I am amazed that Samn thinks that a speed difference is detectable. Regardless of that, macros and Mata don't really mix and Bill's advice in the email Martin mentions is definitive. The key point is, or should be, that interfacing between Stata and Mata should involve at most a few handshakes involving macros; the time taken should be utterly trivial and the difference between different ways of doing it even more so. Nick n.j.cox@durham.ac.uk Martin Weiss Have you had a look at this recent post http://www.stata.com/statalist/archive/2010-04/msg01775.html yet? sun samn I am using MATA to do GMM; somehow I need to input a value of parameter, it seems like local macro setting is faster than global one. Do you have any thoughts about this? * * 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/