One possibility is to generate the noise outside OASIS and simply paste it into a new column. Uniform random noise can be generated in Excel (RAND function) and Gaussian noise can be generated in ModelVision (or Matlab).
Mark
__________________________________________________
Mark Dransfield
Principal Research Scientist
BHP Billiton Minerals Technology
Level 45/600 Bourke St, Melbourne
GPO box 86A, Melbourne, VIC 3001, AUSTRALIA
[EMAIL PROTECTED]
ph. +61-3 9609 4478
fax +61-3 9609 4489
mob +61-4 3835 2993
__________________________________________________
-----Original Message-----
From: Richard irvine [mailto:[EMAIL PROTECTED]]
Sent: Thursday, 14 November 2002 10:29
To: Geosoft Geonet
Subject: [geonet]: Adding random noise
Can anyone suggest an easy method of adding random noise to a channel in an
Oasis Montaj .gdb database? I have done a forward calculation using a
modeling package and am using an inversion package to see if I can duplicate
the original model. I need to add some random, statistical (Gaussian?) noise
to my theoretical data to give the inversion a challenge and I need to be
able to control the noise characteristics (standard deviation).
Dick Irvine
--------------------------
Richard Irvine
Condor Consulting, Inc.
4860 Robb St. #206
Wheat Ridge
CO 80033 USA
Tel (303) 423 8475
Fax (303) 423 9729
email [EMAIL PROTECTED]
or [EMAIL PROTECTED]
Web Site www.condorconsult.com
**Condor is a re-seller for ENCOM and GeoExpress geophysical software**
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