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From myn <...@163.com>
Subject why limit the num of numCategories in AbstractOnlineLogisticRegression
Date Sun, 28 Aug 2011 15:49:19 GMT
I was read the AbstractOnlineLogisticRegression(SGD) sorce code  ,but
it limit the number of numCategories to 2,why? why not 3 or more?

@Override
  public double classifyScalar(Vector instance) {
    Preconditions.checkArgument(numCategories() == 2, "Can only call classifyScalar with two
categories");

    // apply pending regularization to whichever coefficients matter
    regularize(instance);

    // result is a vector with one element so we can just use dot product
    return link(classifyScalarNoLink(instance));
  }

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