Thank you very much for SAC which is very hepfull for our team
we have a question:
1) we compute 4 spectra (a b c d) with FFT command
these spectra have the same frequency delta.
2) then we divide spectrum "a" by spectrum "b"
the result is noted "E"
3) and we divide spectrum "c" by spectrum "d"
the result is noted "F"
4) Now we want to plot E only for frequencies where F is >3
...
How to do that last operation ?
Equipe de Recherche "Risques Sismiques" CETE méditerranée
* Laboratoire de Nice 56 bd Stalingrad F06359 Nice cedex 4 France
* Philippe.Langlaude<at>icarre.net http://www.cetemediterranee.fr
we have a question:
1) we compute 4 spectra (a b c d) with FFT command
these spectra have the same frequency delta.
2) then we divide spectrum "a" by spectrum "b"
the result is noted "E"
3) and we divide spectrum "c" by spectrum "d"
the result is noted "F"
4) Now we want to plot E only for frequencies where F is >3
...
How to do that last operation ?
Equipe de Recherche "Risques Sismiques" CETE méditerranée
* Laboratoire de Nice 56 bd Stalingrad F06359 Nice cedex 4 France
* Philippe.Langlaude<at>icarre.net http://www.cetemediterranee.fr

If I understand your question, you can just use xlim 3 XX, where XX is the
upper limit you want to include in your plot. Do this before your plotsp.
On Tue, 1 Aug 2006, [UTF8] "LANGLAUDE Philippe  CETE Méditerr./LABO NICE/RISQUE NATUREL  GEOLOGIE" wrote:
Thank you very much for SAC which is very hepfull for our team
we have a question:
1) we compute 4 spectra (a b c d) with FFT command
these spectra have the same frequency delta.
2) then we divide spectrum "a" by spectrum "b"
the result is noted "E"
3) and we divide spectrum "c" by spectrum "d"
the result is noted "F"
4) Now we want to plot E only for frequencies where F is >3
...
How to do that last operation ?
Equipe de Recherche "Risques Sismiques" CETE méditerranée
* Laboratoire de Nice 56 bd Stalingrad F06359 Nice cedex 4 France
* Philippe.Langlaude<at>icarre.net http://www.cetemediterranee.fr
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http://www.iris.washington.edu/mailman/listinfo/sachelp

If I understand your question, you can just use xlim 3 XX, where XX is the
upper limit you want to include in your plot. Do this before your plotsp.
On Tue, 1 Aug 2006, [UTF8] "LANGLAUDE Philippe  CETE Méditerr./LABO NICE/RISQUE NATUREL  GEOLOGIE" wrote:
Thank you very much for SAC which is very hepfull for our team
we have a question:
1) we compute 4 spectra (a b c d) with FFT command
these spectra have the same frequency delta.
2) then we divide spectrum "a" by spectrum "b"
the result is noted "E"
3) and we divide spectrum "c" by spectrum "d"
the result is noted "F"
4) Now we want to plot E only for frequencies where F is >3
...
How to do that last operation ?
Equipe de Recherche "Risques Sismiques" CETE méditerranée
* Laboratoire de Nice 56 bd Stalingrad F06359 Nice cedex 4 France
* Philippe.Langlaude<at>icarre.net http://www.cetemediterranee.fr
_______________________________________________
sachelp mailing list
sachelp<at>iris.washington.edu
http://www.iris.washington.edu/mailman/listinfo/sachelp