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AKazak
Russia
1205 Posts |
 Posted - 12/30/2021 : 10:44:29 AM
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OriginPro 2022 (64-bit) SR1 9.9.0.225
Windows 7 Pro SP1 x64
Greetings!
I enjoy using the Distribution function of a Histogram plot.
Is there a way to show the Distribution equation or its parameters on the graph?
Thank you.
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Andrey |
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easwar
USA
1965 Posts |
Posted - 12/30/2021 : 11:38:46 AM
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Hi Andrey,
Thank you for the post, I have added a request for this for our next version (internal jira ID: ORG-24709)
Easwar
OriginLab
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AKazak
Russia
1205 Posts |
Posted - 12/30/2021 : 11:44:54 AM
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quote:
Originally posted by easwar
Hi Andrey,
Thank you for the post, I have added a request for this for our next version (internal jira ID: ORG-24709)
Easwar
OriginLab
I would be happy to test it.
By the way, what is the principal barrier to using Quick Fit Gadget in a Histogram plot window?
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Andrey |
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easwar
USA
1965 Posts |
Posted - 12/30/2021 : 1:30:04 PM
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Hi Andrey,
We have never supported fitting directly on the histogram plot due to some internal reasons. So we recommend creating the bin worksheet and then fitting that data.
BTW fitting a histogram/frequency count output can result in inconsistent fit parameters, as the parameter values from the fit may be sensitive to the bin size. A better approach is to perform Distribution Fit to the raw data itself, using the Statistics->Descriptive Statistics->Distribution Fit tool. Granted, that does not have ALL of the distributions that are available for overlay in the histogram plot.
Easwar |
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AKazak
Russia
1205 Posts |
Posted - 12/30/2021 : 1:47:18 PM
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quote:
Originally posted by easwar
Hi Andrey,
We have never supported fitting directly on the histogram plot due to some internal reasons. So we recommend creating the bin worksheet and then fitting that data.
BTW fitting a histogram/frequency count output can result in inconsistent fit parameters, as the parameter values from the fit may be sensitive to the bin size. A better approach is to perform Distribution Fit to the raw data itself, using the Statistics->Descriptive Statistics->Distribution Fit tool. Granted, that does not have ALL of the distributions that are available for overlay in the histogram plot.
Easwar
Thank you for the suggestion.
However, I want to benefit from interactive data selection and fit results' estimation on the fly.
Can you elaborate on "fitting a histogram/frequency count output can result in inconsistent fit parameters, as the parameter values from the fit may be sensitive to the bin size", please?
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Andrey |
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easwar
USA
1965 Posts |
Posted - 12/30/2021 : 2:23:46 PM
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quote:
Can you elaborate on "fitting a histogram/frequency count output can result in inconsistent fit parameters, as the parameter values from the fit may be sensitive to the bin size", please?
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Andrey
Hi Andrey,
For example, I generated some data in col A of a blank worksheet using script window:
col(1)=nint(100+20*normal(1000));
This should then be a normal distribution with mean of 100 and sigma of 20.
If I then bin this data using the Frequency Count tool (same as what histogram plot and bin worksheet does) with two different bin widths of 5 and 20, and then plot the counts and add the quick fit gadget, you can see the parameter values are different. OF course I chose very different bin widths just to illustrate the point.
Now if I use the raw data itself and perform a distribution fit, I get the result shown in the book at the bottom of the image.
Easwar |
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easwar
USA
1965 Posts |
Posted - 05/09/2023 : 11:39:56 AM
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quote:
Originally posted by AKazak
Is there a way to show the Distribution equation or its parameters on the graph?
Andrey
Hello Andrey,
In version 2023b that we recently published, the distribution parameter values are displayed as a table in the graph.
Easwar |
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AKazak
Russia
1205 Posts |
Posted - 05/09/2023 : 12:55:30 PM
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quote:
Originally posted by easwar
quote:
Originally posted by AKazak
Is there a way to show the Distribution equation or its parameters on the graph?
Andrey
Hello Andrey,
In version 2023b that we recently published, the distribution parameter values are displayed as a table in the graph.
Easwar
Dear Easwar,
Thank you for sharing the news about the great improvement.
I will test the update soon.
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Andrey |
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Topic |
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Histogram plot: show Distribution equation