Hi Michel, We are discussing this possibility right now. I'll get back to you soon with the results.
Cheers, Lorraine -----Original Message----- From: Michel Godbout [mailto:[EMAIL PROTECTED]] Sent: Wednesday, January 09, 2002 8:09 PM To: [EMAIL PROTECTED] Subject: RE: [geonet]: Profile Peak Picker Lorraine and Jeff The first part of Jeff's suggestion works well. This method isolated the high values from 4 channels into a final_channel. But part 2, using his work around for picking the peak within a cluster of points in the final_channel did not work. I then gridded this final_channel and used the grid peak picker gx. This actually works very well but does not satisfy our needs because it often picks the peak off the edge of the actual flight line path. This makes it very difficult to find the actual peak value based on an x,y coordinate. What we really need here is the profile peak picker. What are the chances of getting this as part of the basic package Lorraine? Michel -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Lorraine Godwin Sent: Tuesday, January 08, 2002 8:51 AM To: '[EMAIL PROTECTED]' Subject: RE: [geonet]: Profile Peak Picker Hi Jeff and Michel, We do have a profile peak picker but unfortunately it is only available in our UX-Detect module at the moment. Would this be a useful tool to have for general use? Cheers, Lorraine -----Original Message----- From: Jeff Gamey [mailto:[EMAIL PROTECTED]] Sent: Tuesday, January 08, 2002 10:14 AM To: [EMAIL PROTECTED] Subject: Re: [geonet]: Applying a math expression to data clusters Michel- How about this as a work around? You run a sequence such as: new=ch1; new=(ch2>ch1)?ch2:new; new=(ch3>ch2)?ch3:new; new=(ch4>ch3)?ch4:new; and then pick local peaks from the profile. I don't think there's a profile peak picker in Oasis, but you can build a simple one using lags. "new_m1" is "new" with a -1 lag "new_p1" is "new" with a +1 lag final=(new>new_m1)&(new>new_p1)?new:dummy; I'm not sure I've got the "&" format right, but you get the idea. An messier alternative would be to assign XY values (X=fid, Y=ch#) to each data point, grid them, then use the grid peak picker. Good luck. -Jeff At 06:31 PM 1/7/02 , you wrote: >I need to isolate a single point within each cluster of data points >distributed over several channels. There are multiple clusters of data >throughout the survey. > >ie. Channel_1 Channel_2 Channel_3 Channel_4 >New_Channel > * * * * >* > * * * * >* > * * * * >* > 8.5 7.2 7.3 7.2 >* > 9.5 7.3 6.3 7.1 >* > 18.5 17.2 16.3 17.1 >* > 28.5 37.2 26.3 15.1 >37.2 > 8.9 7.9 6.3 7.1 >* > * * * * >* > * * * * >* > * * * * >* > >Do you have an example of an expression that would achieve the result above? >In this case the >highest value has been picked and placed into "new_channel". > >Michel Godbout >Condor Consulting Inc. >www.condorconsult.com >(303) 423-8475 (303) 423-9729 fax >mailto:[EMAIL PROTECTED] > > > > > > >_______________________________________________________ >More mailing list info http://www.geosoft.com/support/listserv/index.html ********************** * Jeff Gamey (4tj) * Environmental Sciences Division [EMAIL PROTECTED] * Oak Ridge National Laboratory (865) 574-6316 tel * POBox 2008, Bldg 1505, MS6038 (865) 576-8646 fax * Bethel Valley Rd., Oak Ridge, TN (865) 599-0820 cell * 37831-6038 _______________________________________________________ More mailing list info http://www.geosoft.com/support/listserv/index.html _______________________________________________________ More mailing list info http://www.geosoft.com/support/listserv/index.html _______________________________________________________ More mailing list info http://www.geosoft.com/support/listserv/index.html _______________________________________________________ More mailing list info http://www.geosoft.com/support/listserv/index.html
