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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.
*/
#pragma once
//TODO: extend to handle CSOAA_LDF and WAP_LDF
namespace CB_ALGS {
LEARNER::base_learner* setup(vw& all);
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 = ec.l.cb;
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.l.simple = simple_temp;
if (is_learn && simple_temp.label != FLT_MAX)
all.scorer->learn(ec, index-1+base);
else
all.scorer->predict(ec, index-1+base);
float pred = ec.pred.scalar;
ec.l.cb = ld;
return pred;
}
}
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