File Exchange > Data Handling >    Estimate Onset of Slope Change

How to install and run
Author:
OriginLab Technical Support
Date Added:
6/20/2005
Last Update:
12/12/2014
Downloads (90 Days):
7
Total Ratings:
12
File Size:
1 KB
Average Rating:
File Name:
OL_Estimat...et.OPK
File Version:
1.00
Minimum Versions:
7.5
License:
Free
Type:
Tool
Summary:

This tool enables you to estimate the onset of slope change in a graph curve

Screen Shot and Video:
Description:

** Origin version 7.5 SR5 is required **

Often one may want to quickly estimate a point in a graph curve where there is transition/onset point such as shown in the image below.

Typically users want to either pick two points on the curve and draw a tangent at each and find the point of intersection, or they want to pick four points and lines are drawn using each pair of points and the intersection is computed. This tool supports both methods.

To install download the Origin Pack File (OL_Estimate_Onset.OPK) and drag-and-drop the file onto Origin. A new toolbar called Onset will be added. The third button on this toolbar will bring up a PDF document with instructions on how to use this tool.

Updates:

Reviews and Comments:
10/07/2020snowliHi @robert.godin2,

See Minimum Versions field. It says 7.5. So it should work in 8.5.

Thanks, Snow

10/06/2020robert.godin2Does it work with origin 8.5?

08/07/2019OriginLabHi @kuhnra,

Thank you for pointing out. We will fix it later.

Thanks, Yuki

08/07/2019kuhnraI love this tool. It's very useful.
It allows you to define the range in which you want to get the average slope of the tangente. Since it does not detect the maximal slope, you need to adapt the range to the visible maximum slope. This half-automated graphical evaluating method is still better than muddling through with time-wasting self-made Excel formulas.

The downside of this tool is the brevity of the manual. And the file size is not 1 KB, but rather 82 KB.

05/23/2019snowliHi @kuhnra,

This app works on graph window. Please plot your data and then use the app.

Thanks, Snow

05/23/2019snowliHi @kuhnra,

This app works on graph window. Please plot your data and then use the app.

Thanks, Snow

05/23/2019kuhnraSo, I imported the tool, but its buttons are deactivated, even though I have a sheet with two colums filled with numbers data. Any other mathematical operations work, but this tool does not.

02/19/2012hchao2Thanks! It works great for me. As for the comment below, you may want to try the four point method. This tool is easy to use and manipulate.

10/22/2010BunterAbsolutly not useful and mathematic incorrect. The Onset is the intersection between the baseline and the tangent at the point of the highest slope. The baseline of the curves you will get in origin probably correct. The point of the maximal slope is the maximum of the 1st derivate and the slope is the value at this maximum. So you have to calculate the tangent at this point and its intersection with the baseline. Hoping that somebody will program this right and not using some points at a graph to calculate useless data.

11/05/2009bylonethx very much, it's useful

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