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From |
siyama@who.int |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: Using postfile |

Date |
Thu, 20 May 2004 17:10:52 +0200 |

I am struggling with a short programme to create a file of different cross-tabulations. Here's the program and the corresponding output using auto.dta program hrh version 8.0 tempname sim postfile `sim' str20 matcell using results, replace tab `1' `2', matcell(matcell) post `sim' (matcell) postclose `sim' end *************************************************************************** sysuse auto hrh rep78 fore Repair | Record | Car type 1978 | Domestic Foreign | Total -----------+----------------------+---------- 1 | 2 0 | 2 2 | 8 0 | 8 3 | 27 3 | 30 4 | 9 9 | 18 5 | 2 9 | 11 -----------+----------------------+---------- Total | 48 21 | 69 type mismatch post: above message corresponds to expression 1, variable matcell r(109); I would greatly appreciate any help to what is going wrong!! Also what must I add to an ado program to make a running session of stata acknowledge the modifications I am making. Many thanks. Amani -----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nick Cox Sent: 20 May 2004 16:47 To: statalist@hsphsun2.harvard.edu Subject: st: RE: Re: RE: Random number seed That's correct. I overlooked the importance of doing in it in batch mode. It follows that you must change the seed within your do file. Nick n.j.cox@durham.ac.uk > -----Original Message----- > From: owner-statalist@hsphsun2.harvard.edu > [mailto:owner-statalist@hsphsun2.harvard.edu]On Behalf Of Subhankar > Nayak > Sent: 20 May 2004 15:41 > To: statalist@hsphsun2.harvard.edu > Subject: st: Re: RE: Random number seed > > > You are right. > Once I open stata and generate random numbers, the seed keeps on > changing and it is completely randomized. > > But since the program is long, I am running it without opening stata. > I am running it in the batch mode giving the command > > stata -b do market.do > > This program opens stata each time and hence gets the same seed and > the same set of random numbers each time. > > Thanks, > Subh > > ----- Original Message ----- > From: "Nick Cox" <n.j.cox@durham.ac.uk> > To: <statalist@hsphsun2.harvard.edu> > Sent: Thursday, May 20, 2004 10:24 AM > Subject: st: RE: Random number seed > > > > Your premise is false. Just because > > the seed remains the same does not > > imply identical samples (of a given size). > > Conversely, explicitly setting the seed to the same number as before > > the last call does ensure an identical sample. > > > > However, you can indeed change the seed easily. > > > > . search seed > > > > points to ways of doing this. > > > > More generally, there is a great > > deal of help on-line, which will > > save you time. > > > > Nick > > n.j.cox@durham.ac.uk > > > > > -----Original Message----- > > > From: owner-statalist@hsphsun2.harvard.edu > > > [mailto:owner-statalist@hsphsun2.harvard.edu]On Behalf Of > Subhankar > > > Nayak > > > Sent: 20 May 2004 15:16 > > > To: statalist@hsphsun2.harvard.edu > > > Subject: st: Random number seed > > > > > > > > > Can the stata random number seed be itself randomized? > > > > > > I am running a program called "market.do" in the batch > mode without > > > invoking/opening stata. This program carries out an analysis based > > > on a set of 1,000 uniform random numbers it generates. > > > > > > However, since the random seed is always the same > everytime I run the > > > program in batch mode, I get the same set of 1,000 random numbers > > > each time I run this program in batch mode. Results are identical > > > which defeats the purpose. > > > > * > > * 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/ > > > > > * > * 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/ > * * 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/ * * 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/

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