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AKazak
Russia
1205 Posts |
 Posted - 07/27/2020 : 5:34:49 PM
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OriginPro 2020b (64-bit) 9.7.5.184
Windows 7 Pro x64 SP1
Greetings!
How do I tell Peak Analyzer to search not only for peaks (maxima), but also for troughs (valleys)?
Thank you.
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AK |
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yuki_wu
896 Posts |
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AKazak
Russia
1205 Posts |
Posted - 07/28/2020 : 06:50:26 AM
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quote:
Originally posted by yuki_wu
Hi AK,
When you use Peak Analyzer, you can go to Find Peaks page and select Positive in Peak Finding Settings: Direction.
https://www.originlab.com/doc/Origin-Help/PeakAnalyzer-FindPeaks
Hope it helps.
Regards, Yuki
OriginLab
Dear Yuki,
I experimented with the FP settings and discovered that it depends on location of the baseline.
The tool itself seems to look for peaks only. However, if you place the baseline at maximum (above the plot) and set Direction to Negative it will also find troughs (valleys).
My question was about finding both peaks and valleys (local extrema) at a single step.
Is this possible?
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AK |
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lkb0221
China
497 Posts |
Posted - 07/30/2020 : 09:44:45 AM
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If you can get the baseline in the middle of your signal, you can search for both positive (maxima) and negative (valleys) peaks at the same time.
If you cannot, then you might have to do that separately. |
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AKazak
Russia
1205 Posts |
Posted - 07/30/2020 : 10:06:10 AM
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quote:
Originally posted by lkb0221
If you cannot, then you might have to do that separately.
OK, got it!
quote:
Originally posted by lkb0221
If you can get the baseline in the middle of your signal, you can search for both positive (maxima) and negative (valleys) peaks at the same time.
Can you show an example please?
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AK |
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Topic |
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Peak Analyzer: find troughs (valleys)