How does the shareboost algorithm works in shogun?

This recipe explains how does the shareboost algorithm works in shogun.

Recipe Objective

This recipe explains how does the shareboost algorithm works in shogun.
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ShareBoost

The shareboost algorithm uses a forward greedy selection approach and learns a multiclass predictor from a subset of shared features of the samples

x_train = RealFeatures(feats_train)
x_test = RealFeatures(feats_test)
y_train = MulticlassLabels(labels_train)
y_test = MulticlassLabels(labels_test)

s = ShareBoost(x_train, y_train, 2)
s.train()
z = RealSubsetFeatures(x_test, s.get_activeset())
predict = shareboost.apply_multiclass(z)

eval = MulticlassAccuracy()
accuracy = eval.evaluate(predict, y_test)

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