The unimodal index is a measure of the unimodality of a seriation or an ordered sequence of numbers. The unimodal index is scaled from -1 to 1, with 1 being the value for a perfectly unimodal sequence (one peak), -1 the value for a 'perfectly nonunimodal' sequence (one valley), and 0 the expected value for a random seriation.
A standalone software package, Unimodal.nlogo, is available to compute the Unimodal Index. The Unimodal.logo file is in a Zip file. Download the Zip file to your computer and then unZip the file and save the Unimodal.logo file to your computer.
This program is written in NetLogo. To run the program you must first install NetLogo which is freely available from Northwestern University.
The input values need to be in a file. The default file name is Values.txt. The values should be separated by white space (spaces, tabs, line feeds).
Buttons
File - to choose the file where input is to be read. By default input is read from the file Values.txt in the directory or folder where this program is installed on your computer. You can change the folder by hitting the Folder button.
Folder - to change the working directory or folder where the input file is stored.
Run - to run the program and compute the unimodal index for the ordered values in the input file.
On/Off Switches
Bar_Graphsphs - indicates bar graph rather than line graph
Sliders
Accuracy - number of significant figures to use in reporting the unimodal index
Midrange - size of middle section to be analyzed for long stylesPlot
The program will plot your input values.
Please let us know what you think of the OptiPath software. Any bugs you find, any suggestions you have for improving the interface or the functionality. We welcome it all. Thank you.