This program takes input files from the old PsWin software package (now retired!) as well as from SPSS, in order to perform hyperplane-maximised direct oblimin oblique rotation of factor vectors (as well as Varimax if required). Basically, it sweeps the value of delta in the direct oblimin procedure (which can be set one value at a time in SPSS) from a value which will constrain solutions to maximal orthogonality through to maximal obliquity. It monitors the hyperplane count for each solution and chooses the one with the maximal count (i.e. maximises simple structure in the Thurstone/Cattellian tradition- although as Suitbert Ertl notes, this may not be such a good idea anymore!).

You can install this program as a standalone entity - using the installation file below. Make sure you also download and install the pfe text editor - so that you can see the output files you are creating (although you could use Word or Notepad). The Rotate program uses the pfe editor as it's default "Look at the files" routine - so you might as well have it! I apologise for the old Windows interface. but I can't touch the old VB code as I only have VB.NET - and the code and components used in the old Rotate software require too much modernisation and changes. In reality, it needs a proper Delphi interface. But, I'm also thinking about using the new Gradient Projection Algorithms from Bernaards, C.A. and Jennrich, R.J. (2005) Gradient projection algorithms and software for arbitrary rotation criteria in factor analysis. Educational and Psychological Measurement, 65, 5, 676-696 - so I may redo the whole caboodle in Delphi. But not yet!

Download and Installation Information
The installation program may be downloaded here (6.6Mb) as a zipped archive. I've repackaged the installation files in a modern InstallShield setup. The rotate program is installed and is fixed to run in c:\rotate (to maintain compatibility with the old PsWin software).
This new version installation is REQUIRED for the SPSS-to-ROTATE utility software below. An old v.2.1 Word document "how to" file is also installed in this directory.
 
You must also download the pfe text editor here (640k) ... just run the .exe file and it will install itself into c:\pfe ... which is where the Rotate program expects to find it! This free text editor is used to view the output files from Rotate.

  SPSS-to-Rotate Utility. This program allows a user to create "Rotate-ready" input files from SPSS results tables (exported as Excel files) or from standard Excel tables. The utility comes with a "how to" online program help file which contains detailed step-by-step instructions on how to extract files from SPSS, create them manually in Excel, and then use the program to convert these into "Rotate-ready" files. I've tested it as best I can and it seems pretty well OK. I found a small formatting error in the SPSS-to-Orthosim routine (which uses similar code) and so have corrected that software as well as ensured this software is also free of that error. If you had downloaded the SPSS-to-Orthosim software prior to 1st November, 2005, I suggest you whiz over to the page to download just the updated executable file (you don't need to re-install everything). The SPSS-to-Rotate utility installation software is available for download here (5.5Mb)  as a zipped archive - just run the file and follow the usual instructions. The software may be installed in any directory of your choice.

Note: The STATISTICA routines for creating "Rotate-ready" unrotated factor-loading files directly from STATISTICA results workbook spreadsheets are available for download from my software page.