title: How to convert Vowpal Wabbit logistic predictions to probabilities
body: <p>I have given vowpal wabbit a dataset with two labels and performed logistic regression with it. The problem is, it is returning real numbers varying from positive to negative as prediction. Now if I want to transform these values to probability of some sort. How should I go about it.</p>
  
  <p>I was thinking maybe the predicted value is a'x where a is coefficient vector and x is the feature vector. If this is the case then I can directly use the binomial link function to get the probs.</p>