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 Line disconnection and fitting

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T O P I C    R E V I E W
bernoo Posted - 05/08/2023 : 10:08:59 AM
Origin Ver. and Service Release (Select Help-->About Origin):
Operating System:

Hello everybody


I have a problem with the displaying of a line diagram and I am currently stuck. My line curve first rises and then shows strong jumps (see picture in the attachment). I would like to make two changes:

1) I would like to show only the line up to the maximum value as a solid line and show the progression after that by a dashed line. If this is not possible, I would like to delete everything after the maximum value. Do I have to disconnect the line somehow?

2) I would like to smooth the curve up to the maximum value by the upper values. Which function do I use best for this?

Thanks a lot for your help!

7   L A T E S T    R E P L I E S    (Newest First)
YimingChen Posted - 05/09/2023 : 12:20:55 PM
Please check the attached project file. You could use menu Gadgets->Quick Peaks... to find the peaks on the curve. Then you can either connect those peaks or do a curve fitting to get the trend curve.

In Book1, I added col(C) as the line style column (1 = solid, 2 = dashed). Double-click on the line on the graph, and you could see the line style is referring to that column.



https://my.originlab.com/ftp/forum_and_kbase/Images/TrendLine1.opju


James
bernoo Posted - 05/08/2023 : 6:07:55 PM
First of all thank you so much for your help! I really appreciate it. I'm sorry that the file upload did not works planned. Here is the Excel file with the data set. I need the time on the x-axis and the force on the y-axis.


https://my.originlab.com/ftp/forum_and_kbase/Images/Data%20Origin.xlsx
YimingChen Posted - 05/08/2023 : 2:56:52 PM
The data is not saved with the project. Could you also share the Excel file ASTM1002_104 Kopie.xlsx? Thanks.

James
bernoo Posted - 05/08/2023 : 12:47:47 PM
https://my.originlab.com/ftp/forum_and_kbase/Images/Project%20File%20beernoo0.opju
YimingChen Posted - 05/08/2023 : 12:33:49 PM
Could you share your project file?

bernoo Posted - 05/08/2023 : 12:18:00 PM
Thanks for your help. But unfortunately, non of your recommendations works (or I do not know how to apply them correct)

For your second advice f.e. regardless how many smoothing points I choese, it just gets worse and worse by increasing the number (picture)

YimingChen Posted - 05/08/2023 : 11:15:38 AM
1) If you double-click on the line to open the Plot Details dialog. Under the Line tab, you can set the Style to Line, Dash, or refer to a column. You can add a new column to the worksheet as line style, and have the line style refer to that column.

2) For smoothing, you can probably use this envelope tool.
https://www.originlab.com/doc/Origin-Help/Envelope

Thank you
James

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