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/*
Copyright (c) by respective owners including Yahoo!, Microsoft, and
individual contributors. All rights reserved. Released under a BSD
license as described in the file LICENSE.
*/
#ifndef CB_ALGS_H
#define CB_ALGS_H
//TODO: extend to handle CSOAA_LDF and WAP_LDF
namespace CB_ALGS {
LEARNER::learner* setup(vw& all, std::vector<std::string>&, po::variables_map& vm, po::variables_map& vm_file);
template <bool is_learn>
float get_cost_pred(vw& all, CB::cb_class* known_cost, example& ec, uint32_t index, uint32_t base)
{
CB::label* ld = (CB::label*)ec.ld;
label_data simple_temp;
simple_temp.initial = 0.;
if (known_cost != NULL && index == known_cost->action)
{
simple_temp.label = known_cost->cost;
simple_temp.weight = 1.;
}
else
{
simple_temp.label = FLT_MAX;
simple_temp.weight = 0.;
}
ec.ld = &simple_temp;
if (is_learn)
all.scorer->learn(ec, index-1+base);
else
all.scorer->predict(ec, index-1+base);
ec.ld = ld;
return simple_temp.prediction;
}
}
#endif
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