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tejasrnbr
India
2 Posts |
 Posted - 11/25/2016 : 06:08:20 AM
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Origin Ver. and Service Release (Select Help-->About Origin): Origin 2016 b9.3.226
Operating System: Windows 10 64 bit
I have a curve with about 1200 data points.
I have generated the first and second derivative curves for the data.
I want to find the Y values from the base curve, when certain conditions are met in 1st and 2nd derivative.
For example, In 1st derivative becomes 0, what is the X value and what is the Y- value in base curve. Also, if second derivative has 4 inflection points, then what are the corresponding Y values from the base curve.
Can anybody suggest a method or solution for this? |
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JacquelineHe
287 Posts |
Posted - 11/28/2016 : 06:23:17 AM
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Hi,
Do you use "Analysis: Mathematics: Differentiate" tool to get the derivative?
If so, by default the output value will create in a new column next to the source dataset. (Output =(<input>,<new>) )
You can find both source and the result dataset in the same worksheet.
So you will not need to find the source data in other method.
If I misunderstand your question, could you please tell us more detail about your quetison?
Thanks
OriginLab
Jacqueline |
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tejasrnbr
India
2 Posts |
Posted - 11/29/2016 : 01:26:49 AM
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Hello Jacqueline,
Thanks for your reply to my query. Yes, I did use the specific feature that you mention. In this manner, I have generated the derivative curves and have the new columns.
Now, what I want is:
To find out X, Y values of base curve when the X, Y values in derivative curve meet certain criteria. For example, I want to know X, Y values of base curve, when the Y in derivative curve is 0, and when Y in derivative curve turns from positive to negative.
That is what I want to do. Is there some code or command to get this instead of manually reviewing the data?
quote:
Originally posted by JacquelineHe
Hi,
Do you use "Analysis: Mathematics: Differentiate" tool to get the derivative?
If so, by default the output value will create in a new column next to the source dataset. (Output =(<input>,<new>) )
You can find both source and the result dataset in the same worksheet.
So you will not need to find the source data in other method.
If I misunderstand your question, could you please tell us more detail about your quetison?
Thanks
OriginLab
Jacqueline
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JacquelineHe
287 Posts |
Posted - 11/29/2016 : 05:56:43 AM
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Hi,
1. If you do not need to update source data and recalculate the result, you can click on the green lock (on the header of the column) and choose "Recalculate Mode: None". And add a Data Filter on the result column. Then you can custom the fiter condition to find the datasets.
Please refer to this help page:http://www.originlab.com/doc/Origin-Help/Wks-DataFilter
2. If you want to keep recalculation mode on your result column, you can try to use Worksheet Query tool to extract the dataset matching your condition to a new sheet or book. (Choose menu: Worksheet: Worksheet Query)
Please refer to this help page: http://www.originlab.com/doc/Origin-Help/Wks-Query
Thanks
Jacqueline
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Edited by - JacquelineHe on 11/29/2016 05:59:42 AM |
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Get Y (at X) of base curve based on derivative cdn