File Exchange > Graphing >    Tangent

Author:
OriginLab Technical Support
Date Added:
8/5/2015
Last Update:
11/20/2023
Downloads (90 Days):
10351
Total Ratings:
159
File Size:
278 KB
Average Rating:
File Name:
Tangent.opx
File Version:
1.80
Minimum Versions:
License:
Free
Type:
App
Summary:

Draw a tangent line at selected point of a data plot.

Screen Shot and Video:
Description:

Purpose:
This app draws a tangent line at selected point of a data plot in a graph. A smoothing option is available for computing the derivative for noisy data.

Installation:
Download the file Tangent.opx, and drag and drop it onto the Origin workspace. An icon will appear in the Apps Gallery window.

Operation:

  1. Click the icon to open dialog. Change dialog settings as desired and press OK. A vertical line will be added to the graph.
  2. Drag the vertical line to select a desired point on the curve. The tangent line will update as you move the vertical line.
  3. Press the triangle button at the top right of the graph to display a context menu. Select "New Output" to add tangent line at currently selected point.
    You can then move the cursor to other points on the curve to add additional tangent lines.
  4. Select "Preferences..." from the context menu to re-open the dialog to change settings.
    When dialog is open, press "?" button, or F1 to open the help file.

Note:

It is best to use this app in Origin 2019B, or higher version. For lower version than Origin 2019B, if the plot is xy-exchanged, the horizontal for selecting data point is not able to be moved vertically by draging the line itself. The way to make this line moved is to drag one of the two handles, and even dragging the handle, the line would not move with the handle together, but it would jump to the position of the handle after the dragging done.

Updates:

11/17/2015 v1.1 Supports duplicate values in x data.
8/16/2018 v1.2 Fixed bug for wrong data with multiple plots, support for Chinese version.
3/19/2019 v1.3 Support apparent tangent and xy exchanged graph
6/20/2019 v1.4 Change minimum version to Origin 2016
6/22/2020 v1.5 Fixed localization issue for Japanese
8/23/2022 v1.6 Fixed tangent line position issue for double-y plot in Origin 2023
3/2/2023 v1.7 Fixed bug of showing wrong point index with hidden data
11/3/2023 v1.8 New icon for dark mode

Reviews and Comments:
06/12/20243362906m

05/23/2024123456wytgood

05/20/2024  

04/27/2024  

04/02/2024  

03/27/2024  

03/19/2024  

02/18/2024  

12/11/2023zhouhang 

11/25/20231637843308I want to use it.

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