Calculate the radius of curvature of a data plot.

Purpose
This app can be used to calculate the radius of curvature at a specified point in the active graph.

Installation
Download the file "Curvature Radius.opx", then drag-and-drop onto the Origin workspace.

Operation

1. With a graph window active, click the "Curvature Radius" icon in the Apps panel. A dialog box will open where you can select options.
2. Click the Help button (?) in the top right of the dialog to open the help file. The file includes an explanation of the dialog settings, examples and algorithm.

2021-03-01, v1.2, fix wrong context menu issue
2018-09-25, v1.1, support for finding minimum radius, output all radius