Merge pull request #25 from EducationalTestingService/update-readme

Updates to readme

Author: jbiggsets

README.rst

@@ -12,10 +12,10 @@ FactorAnalyzer
     :target: https://anaconda.org/desilinguist/factor_analyzer/
 
 
-This is a Python module to perform exploratory factor analysis, with
-optional varimax and promax rotations. Estimation can be performed using
-a minimum residual (minres) solution, or maximum likelihood estimation
-(MLE).
+This is a Python module to perform exploratory factor analysis, with several
+optional rotations. Estimation can be performed using a minimum residual
+(minres) solution (identitical to unweighted least squares), or maximum
+likelihood estimation (MLE).
 
 Portions of this code are ported from the excellent R library ``psych``.
 
@@ -56,12 +56,23 @@ Two common types of rotations are:
    upon the varimax rotation, but ultimately allows factors to become
    correlated.
 
-This package includes a stand-alone Python module with a ``FactorAnalyzer()``
+This package includes a stand-alone Python module with a ``FactorAnalyzer``
 class. The class includes an ``analyze()`` method that allows users to perform
 factor analysis using either minres or MLE, with optional rotations on the factor
-loading matrices. The package also offers a stand-alone ``Rotator()`` class to
+loading matrices. The package also offers a stand-alone ``Rotator`` class to
 perform common rotations on an unrotated loading matrix.
 
+The following rotations options are available in both ``FactorAnalyzer``
+and ``Rotator``:
+
+    (a) varimax (orthogonal rotation)
+    (b) promax (oblique rotation)
+    (c) oblimin (oblique rotation)
+    (d) oblimax (orthogonal rotation)
+    (e) quartimin (oblique rotation)
+    (f) quartimax (orthogonal rotation)
+    (g) equamax (orthogonal rotation)
+
 Example
 -------