| T O P I C R E V I E W |
| nesgio |
Posted - 10/18/2023 : 10:26:44 AM
Hello,
I am currently plotting a chromatogram, which represents the signal over time. I would like to compute the signal-to-noise ratio using Origin. However, I couldn't find a specific method to do so. Could you please let me know if it is feasible to calculate the signal-to-noise ratio in OriginPro?
Below you can find a representation of what I would like to do:
Here the details of my OriginPro version and operating system:
OriginPro 2022 and Service Release 9.9.0.225
Operating System: Windows 10 Enterprise Build 19045
Thank you!
Gioele |
| 6 L A T E S T R E P L I E S (Newest First) |
| aplotnikov |
Posted - 11/13/2023 : 1:16:41 PM
Hi Gioele,
quote:
Originally posted by nesgio
I am familiar with the book you mentioned.
Wonderful. And why you do not follow the definitions in this book? I mean the equation (6.19) on page 138.
quote:
I would like to automate the S/N computation with Origin using methods such as RMS or Peak-to-Peak.
1. Are you sure that this methods are common in chromatography? Felinger has avoided this definitions, by the way.
2. https://www.originlab.com/doc/LabTalk/ref/Rms-func br /
(somebody does read manuals, heh - but you can easily implement this function by yourself!)
3. You can easily implement "Peak-to-Peak" method using Origin _basic_ features - as a Labtalk or a Python script.
quote:
May I ask you how do you perform S/N calculations in Origin?
Last time I calculated S/N for chromatographic data was nine or ten years ago. I don't think there has been much change since then. I used the definition from Felinger's book. You need peak height - it can be found either by approximation (NLSF) or simply by smoothing/interpolation (everything can be automated in Origin using standard features!), you can even subtract baseline if necessary (already implemented in Origin as well). And divide the result by standard deviation of the baseline multiplied by 4. Equation (6.19) on page 138.
quote:
Amanda mentioned that this function is not yet implemented.
She mentioned that the complete calculation is not implemented as a separate app. But all the necessary operations _are_ implemented. Everything you need belongs to the basic Origin features. You can easily implement this calculation using Labtalk (or Python - I know, Labtalk is rather a stepchild for Originlab last years).
Regards,
Alex |
| nesgio |
Posted - 11/13/2023 : 11:29:33 AM
quote:
Originally posted by AmandaLu
Hi,
Origin cannot calculate signal-to-noise ratio right now. But we already have a plan to support it in an App (APPS-699).
Thanks,
Amanda
OriginLab Technical Service
Hi Amanda,
Many thanks for your answer. Please keep me posted when the app will be available.
Best regards,
Gioele |
| nesgio |
Posted - 11/13/2023 : 11:25:20 AM
quote:
Originally posted by aplotnikov
Hi Gioele,
You can find the description of the S/N calculation methods in chromatography in the book "Data Analysis and Signal Processing in Chromatography" by A.Felinger, Elsevier, 1998, pp.137-139
You do not need any additional tools - all the necessary operations are already implemented in Origin.
Hi aplotnikov,
Thanks for your response, I am familiar with the book you mentioned. I would like to automate the S/N computation with Origin using methods such as RMS or Peak-to-Peak.
May I ask you how do you perform S/N calculations in Origin? Amanda mentioned that this function is not yet implemented.
Best regards,
Gioele |
| aplotnikov |
Posted - 11/13/2023 : 05:30:14 AM
quote:
Originally posted by AmandaLu
Origin cannot calculate signal-to-noise ratio right now.
Hi Amanda,
I'm just wondering, what exactly Origin can't calculate right now? The standard deviation of the baseline or the peak height?
P.S. It is impossible to provide customers an app for every particular task they have, moreover it's a wrong concept from my point of view. Sometimes they should learn basics. Seems, that just few of them even try to read Origin manuals at all. |
| aplotnikov |
Posted - 11/13/2023 : 03:41:26 AM
Hi Gioele,
You can find the description of the S/N calculation methods in chromatography in the book "Data Analysis and Signal Processing in Chromatography" by A.Felinger, Elsevier, 1998, pp.137-139
You do not need any additional tools - all the necessary operations are already implemented in Origin. |
| AmandaLu |
Posted - 11/13/2023 : 02:55:44 AM
Hi,
Origin cannot calculate signal-to-noise ratio right now. But we already have a plan to support it in an App (APPS-699).
Thanks,
Amanda
OriginLab Technical Service
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