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Poffel1985
Germany
17 Posts |
 Posted - 01/26/2017 : 04:42:26 AM
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Origin Ver. and Service Release: 2016 SR1
Operating System: 7
Hello, i would like to use a fitting function similiar to this tutorial
http://www.originlab.com/doc/Tutorials/Fitting-Convolution
In this example, one has 1 X-axis and 2 Y-Axis: Time|Signal|Response
This fitting will not work, if the response is shifted. Usually this is the case, as the measurement of the response is a different measurement. Is it possible to include a shift between signal and response while fitting? (I never worked with Origin C or user fitting functions). I would appreciate every bit of help.
Best regards |
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Poffel1985
Germany
17 Posts |
Posted - 02/04/2017 : 02:36:28 AM
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Nobody has an idea?  |
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yuki_wu
896 Posts |
Posted - 02/06/2017 : 02:21:44 AM
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Hi,
I suggest that you can manage the data before you do fitting.
Generally, the peak of impulse response should correspond to the peak of signal as illustrated:
So shift the impulse response to an appropriate position, and then try to do fitting.
Regards,
Yuki
OriginLab
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Poffel1985
Germany
17 Posts |
Posted - 02/06/2017 : 07:09:29 AM
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| If there is really no other way, I have to do this. However, I have hundreds of measurements. Therefore, I hoped there would be another way. Can I adjust the script somehow, that it excepts a second x column? Then I could manually change the offset. |
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yuki_wu
896 Posts |
Posted - 02/07/2017 : 01:44:39 AM
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Hi,
I suppose that your data has 2 X-axis and 2 Y-axis: Time1| Signal| Time2| Response. If so, there may be a way to resolve this problem.
Would you mind sending your data to us via email: tech @originlab.com, so that we can play with it and try to show you an example?
Regards,
Yuki
OriginLab
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Poffel1985
Germany
17 Posts |
Posted - 02/07/2017 : 06:53:18 AM
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| Thank you, I have sent you an example origin file with the data |
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Poffel1985
Germany
17 Posts |
Posted - 04/05/2017 : 03:39:22 AM
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Back to my original problem:
If I have two identical x-axis (same time values, same mesh) and I have two Y-Axis: Signal and System response.
However, both are shifted in regards to each other (time offset).
Do I really have to manipulate the date in a way, that the peaks match? Or is it not important for a convolution? If it is important, could you adjust the original ConvolutionGaussianFit?
Best regards |
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yuki_wu
896 Posts |
Posted - 04/05/2017 : 04:45:10 AM
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Hi,
I have sent you a mail on Feb 8. Have you received it? In that mail, I asked a few of questions since I was not sure whether I understood your source data fully. Could you please check it?
Thanks,
Yuki
OriginLab |
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Topic |
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Fitting with convolution