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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
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Hi Stu, Don, Can the same be used on for gradient in 3 dimensions ? Tyn -----Original Message----- From: idvusers-bounces@xxxxxxxxxxxxxxxx [mailto:idvusers-bounces@xxxxxxxxxxxxxxxx] On Behalf Of Don Murray Sent: Friday, May 01, 2009 9:06 PM To: Stuart Wier Cc: IDV Users Subject: Re: [idvusers] IDV formula for gradient of scalar field Hi Stu- Stuart Wier wrote: > > I need to make an IDV formula to make the gradient of a 2d scalar > field (a new 2d vector field), and also the magnitude of the gradient > as a new scalar field. Anyone know how to do that offhand? You can use the grad(S) python procedure in the griddiag.py module to compute the gradient. Use the mag(V) procedure to compute the magnitude of the resulting vector: mag(grad(S)) You can use the Grid->Define a grid diagnostic Formula to try this on the fly, or create a formula. All the jython procedures are documented at: http://www.unidata.ucar.edu/software/idv/docs/userguide/tools/JythonLib. html (I just noticed that the mag function on that page is not formatted correctly. I'll fix that for a future release). Don ************************************************************* Don Murray UCAR Unidata Program dmurray@xxxxxxxxxxxxxxxx P.O. Box 3000 (303) 497-8628 Boulder, CO 80307 http://www.unidata.ucar.edu/staff/donm ************************************************************* _______________________________________________ idvusers mailing list idvusers@xxxxxxxxxxxxxxxx For list information, to unsubscribe, visit: http://www.unidata.ucar.edu/mailing_lists/ Internal Virus Database is out of date. Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: 270.9.17/1845 - Release Date: 12/12/2008 9:02 AM International Institute for Geo-Information Science and Earth Observation (ITC) Chamber of Commerce: 410 27 560 E-mail disclaimer The information in this e-mail, including any attachments, is intended for the addressee only. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution or action in relation to the content of this information is strictly prohibited. If you have received this e-mail by mistake, please delete the message and any attachment and inform the sender by return e-mail. ITC accepts no liability for any error or omission in the message content or for damage of any kind that may arise as a result of e-mail transmission.
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