title: CV function in RidgeCV
body: <p>I am working with the Ridge regression function in sci-kit learn. </p>
  
  <p>There is a cross validation function RidgeCV. The basic (example) settings are:</p>
  
  <pre><code>RidgeCV(alphas=[0.1, 1.0, 10.0], cv=None, fit_intercept=True, scoring=None,
      normalize=False,store_cv_values=True)
  </code></pre>
  
  <p>Lets say I wanted to do a 10 fold CV. Am I setting it with the "cv= " argument? Every RidgeCV I look at has cv set to cv=None. </p>
  
  <p>1) Not even sure this is the right place to set a 10 fold.</p>
  
  <p>2) Can't find in the documentation the other CV= parameters values besides "None".</p>
  
  <p>Thanks</p>