Create kernel density plot for Cartesian, Polar, or Ternary data.

PURPOSE
This app can be used to create kernel density contour plot for xy Cartesian data, for polar data, or xyz ternary data.

INSTALLATION
Download KernelDensityPlot.opx file, and then drag-and-drop onto the Origin workspace. An icon will appear in the Apps Gallery window.

OPERATION

1. Make a worksheet for input data, a polar plot or ternary plot active. Click the Kernel Density Plot icon in the Apps Gallery window.
2. In the dialog, select a graph type from Graph Type drop-down list. Three types are available: xy Cartesian, Polar and Ternary. Click OK button.
3. If xy Cartesian is chosen in the above step, Origin's built-in 2D Kernel Density dialog will be opened to create kernel density contour or image for xy data.
4. If Polar is chosen, a dialog for polar density plot will be opened.
   1. Choose polar data type first: theta(X) r(Y) or r(X) theta(Y).
   2. Select polar data in Input Data. Polar data can be xy columns in worksheet or polar plot, and unit for theta data should be Degree.
   3. Choose a method for kernel density: Bivariate Kernel Density Estimator or Rule of Thumb.
   4. Number of Grid Points in r/theta can determine number of rows/columns in polar density matrix.
   5. Grid Range can be used to specify r/theta ranges for polar density data.
   6. Click OK button. A polar density contour plot will be created.
5. If Ternary is chosen, a dialog for ternary density plot will be opened.
   1. Select ternary data in Input Data. Ternary data can be xyz columns in worksheet or ternary plot.
   2. Choose ternary scale type in Scale Type: 0-1 or 0-100.
   3. Choose a method for kernel density: Bivariate Kernel Density Estimator or Rule of Thumb.
   4. Number of Grid Points in X/Y can specify number of grid points in ternary's x and y directions, and ternary's z is calculated by x and y.
   5. Click OK button. A ternary density contour plot will be created.

Sample OPJU File
This App provides a sample OPJU file.  Right click on the Kernel Density Plot icon in the Apps Gallery window, and choose Show Samples Folder from the short-cut menu. A folder will open. Drag-and-drop the project file KernelDensityPlotEx.opju from the folder onto Origin. The Notes window in the project shows detailed steps.
Note: If you wish to save the OPJU after changing, it is recommended that you save to a different folder location (e.g. User Files Folder).