File Exchange > Graphing >    Tangent

Author:
OriginLab Technical Support
Date Added:
8/5/2015
Last Update:
8/15/2018
Downloads (90 Days):
9475
Total Ratings:
40
File Size:
270 KB
Average Rating:
File Name:
Tangent.opx
File Version:
1.2
Minimum Versions:
License:
Free
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.

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.

Reviews and Comments:
12/23/2018123456789haihao

12/23/2018123456789haihao

12/23/2018123456789haihao

12/23/2018123456789haihao

12/23/2018123456789haihao

11/20/20181063753700ssssss

11/20/20181063753700dddddd

11/15/2018OriginLabHi litengkun,
If you want to change the target curve to get its tangent line, you can click on the triangle button at the right-top corner to select Change Data fly-out menu to switch the curves.

11/14/2018litengkun不能选点,如果有两个峰怎么处理,选不到底下的峰?

10/16/2018OriginLabHi 562481113, if you use Exchange X-Y Axes option, it will not work. We will fix it in the next version.

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