utils.h revision bc0a56da15eed8738e8a53e2dd340030332df28a 
1// Copyright 2016 The TensorFlow Authors. All Rights Reserved.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14// =============================================================================
15
16#ifndef LEARNING_LIB_TENSOR_FOREST_HYBRID_CORE_OPS_UTILS_H_
17#define LEARNING_LIB_TENSOR_FOREST_HYBRID_CORE_OPS_UTILS_H_
18#include <vector>
19
20#include "tensorflow/core/framework/tensor.h"
21#include "tensorflow/core/platform/types.h"
22
23namespace tensorflow {
24namespace tensorforest {
25
26// Returns the probability that the point falls to the left.
27float LeftProbability(const Tensor& point,
28                      const Tensor& weight,
29                      float bias,
30                      int num_features);
31
32float LeftProbabilityK(const Tensor& point,
33                       std::vector<int32> feature_set,
34                       const Tensor& weight,
35                       float bias,
36                       int num_features,
37                       int k);
38
39// Returns a random set of num_features_to_pick features in the
40// range [0, num_features).  Must return the same set of
41// features for subsequent calls with the same tree_num, node_num, and
42// random_seed.  This allows us to calculate feature sets between calls to ops
43// without having to store their values.
44void GetFeatureSet(int32 tree_num, int32 node_num, int32 random_seed,
45                   int32 num_features, int32 num_features_to_pick,
46                   std::vector<int32>* features);
47
48}  // namespace tensorforest
49}  // namespace tensorflow
50
51#endif  // LEARNING_LIB_TENSOR_FOREST_HYBRID_CORE_OPS_UTILS_H_
52
53
54