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From |
Anisa Shyti <anisa.shyti@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: matrix of initial values in ml estimations |

Date |
Tue, 10 Apr 2012 16:33:26 +0200 |

Hi Marteen, Thank you for your reply. I am using a program that I define, with a set of temporary variables etc. The command I use is the following: ml model lf wmidwr (alpha: option pl pu r = )(beta: ), technique(nr 6 dfp 3 bhhh 3) init(0.1 0.1, copy) ml maximize, iterate(160) difficult Where shall I insert the loops for the initial values? Thank you very much. Anisa On Tue, Apr 10, 2012 at 4:00 PM, Maarten Buis <maartenlbuis@gmail.com> wrote: > > On Tue, Apr 10, 2012 at 3:38 PM, Anisa Shyti wrote: > > I would like to test a series of initial values for my coefficient > > estimates in maximum likelihood. For this particular estimation, I > > have two parameters, which values for both may fall in the range (0 > > ,1). > > > > How can I define a matrix that tests for all the possible initial > > values (eg., 0.1, 0.2, 0.3, ...., 0.9) for both parameters? > > The details depend on the exact program you are using but you'll > probably end up using a nested loop, e.g. > > forvalues i = 1/9 { > forvalues j = 1/9 { > local a = `i'/10 > local b = `j'/10 > ... , from( /a=`a' /b=`b') ... > } > } > > Notice that it is generally good practice to code -forvalues i = 1/9- > and inside the loop divide `i' by 10 instead of -forvalues i = > 0.1(0.1).9-. The reason is that a computer works in binary and in > binary the number 0.1 is like 1/3 in decimal. > > Hope this helps, > Maarten > > -------------------------- > Maarten L. Buis > Institut fuer Soziologie > Universitaet Tuebingen > Wilhelmstrasse 36 > 72074 Tuebingen > Germany > > > http://www.maartenbuis.nl > -------------------------- > * > * 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/ * * 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/

**Follow-Ups**:**Re: st: matrix of initial values in ml estimations***From:*Maarten Buis <maartenlbuis@gmail.com>

**References**:**st: matrix of initial values in ml estimations***From:*Anisa Shyti <anisa.shyti@gmail.com>

**Re: st: matrix of initial values in ml estimations***From:*Maarten Buis <maartenlbuis@gmail.com>

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