Hello, First you have to see what is the perturbation mechanism used in the program: random swapping or random sampling of target histogram. In the first case, the initial image typically reproduces the target histogram and so it won't be affected by the pertubations. In the second case (which I believe is implemented in your version of sasim), poor reproduction of target histogram might indicate the need for increasing the relative weight assigned to this objective function component. Note that with only 42 observations both target histogram and semivariogram might not be highly reliable and deviations from these targets should be allowed.
Regards, Pierre Goovaerts <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><> Dr. Pierre Goovaerts President of PGeostat, LLC Chief Scientist with Biomedware Inc. 710 Ridgemont Lane Ann Arbor, Michigan, 48103-1535, U.S.A. E-mail: [EMAIL PROTECTED] Phone: (734) 668-9900 Fax: (734) 668-7788 http://alumni.engin.umich.edu/~goovaert/ <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><> On Tue, 15 Jul 2003, [big5] ¦¨¥J wrote: > Hello all members. > I have a question about the subroutine "SASIM" in "Gislib". > I have 42 sample data and analysis it's spatial correction structure (variogram) , > then i use the information of it's histogram , variogram and indicator variogram > into "SASIM" to generate several realizations. > But the histogram of these realizations can't honor original sample data. > Is any thing wrong in the procedure and is there any special techincque to adjust > the parameter of "annealing schedule" ? > Thank you for reading this message. > Best Regards. > > Fan Cheng Cheng. > National Chengkung University in Taiwan. > E-mail: [EMAIL PROTECTED] > > > -- * To post a message to the list, send it to [EMAIL PROTECTED] * As a general service to the users, please remember to post a summary of any useful responses to your questions. * To unsubscribe, send an email to [EMAIL PROTECTED] with no subject and "unsubscribe ai-geostats" followed by "end" on the next line in the message body. DO NOT SEND Subscribe/Unsubscribe requests to the list * Support to the list is provided at http://www.ai-geostats.org
