Purpose
This app can be used to decompose observed mixed signals into sub-components which are assumed to be independent from each other. Input data can be either columns or matrices.
Three methods are supported:
- FastICA
- Information-Maximization (Infomax)
- Joint Approximate Diagonalization of Eigenmatrices (JADE)
Installation
The app requires R software (recommended version 4.4.1) and package (ica).
- Open the download page for R version 4.4.1
- Download the file named R-4.4.1-win.exe and install it
- Once you have successfully installed R, you can then install the App
- The App will download and install required R packages when you run it the first time.
Note that if you installed the App prior to instalilng R, the App icon will show in the Apps bar.
Simply click on that icon to continue after you have installed R.
Note: If downloading packages fails, a pop-up dialog will ask you to copy 2 lines of commands from Results Log and run them in R to complete downloading packages.
Related FAQ: FAQ-1214 What can I do when Origin has trouble launching R?
Operation
- Activate a worksheet or a matrix sheet with data.
- Click the icon in the Apps Gallery window to open the dialog.
- For a worksheet, select at least 2 columns as Mixed Data. Optionally select a column (e.g. Time/Frequancy) as Independent Data.
- In the Settings tab, select a method from FastICA, Info-max and JADE.
- If FastICA is selected, choose a algorithm from Parallel/Deflation and a contrast function from Logcosh/ Exponential/ Kurtosis.
- If Info-max is selected, choose a algorithm from Newton Iteration/Gradient Descent and a nonlinear function from Hyperbolic Tangent/ Logistic/ Extended Infomax.
- Enter a number into Number of Components to Extract. It should be at least 2 and no more than the number of input data.
- In the Quantities and Plots tab, choose which quantities and plots to output.
- Click OK button to create analysis reports.
Sample OPJU File
The App ships with a sample OPJU file. In the Apps Gallery, right-click on the app icon and select Show Samples Folder. From the window that opens, drag and drop ICA Samples.opju into Origin to open the project. The project includes two folders. Note: If saving the OPJU after changing it, it is best to save it to a different location than the one it was opened from (e.g. save to your User Files Folder).