[Seisunix] info derivative

Shuki Ronen shuki.ronen at gmail.com
Wed Nov 4 18:44:29 CET 2020


I think I had this problems some time ago and wrote a quick and dirty time
differentiator.  Attached TAZ.  -- Shuki

On Wed, Nov 4, 2020 at 8:50 AM Dominique ROUSSET <
dominique.rousset at univ-pau.fr> wrote:

> Hi,
> I agree with you.
>
> Comparing the outputs of
> suvibro f1=0.5 f2=0.5 | suxgraph style=normal width=1500 title=normal
> suvibro f1=0.5 f2=0.5 | suop of=diff | suxgraph style=normal width=1500
> title=normal
>
> it looks like there is an absolute value somewhere in the data flow.
> Notice that abs is the default option. So, I suspect a bug....
>
> The code needs to be checked.
> D.
>
> On 04/11/2020 17:16, vld3 wrote:
>
> Hello everyone
>
> I would like to apply a derivative to a signal.
> I made a test with a simple cosine (created with suvibro) applying suop op=diff ... but I didn't get a sine. Why?
> thanks in advance
>
> -- luca
>
>
>
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>
> --
> |Dominique Rousset           LFCR UMR5150 / E2S UPPA / Dpt des géosciences|
> |Univ. Pau et des Pays de l'Adour BP 1155       F-64013 Pau Cedex - France|
> |mailto:dominique.rousset at univ-pau.fr <dominique.rousset at univ-pau.fr> jami:drousset http://lfc.univ-pau.fr|
> |Off: +33 559 407 423|Cell: +33 660 861 391|xmpp: dominique at rousset.nom.fr|
>
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