Compute Library
 21.08
MeanStdDev.cpp
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24 #include "MeanStdDev.h"
25 
26 namespace arm_compute
27 {
28 namespace test
29 {
30 namespace validation
31 {
32 namespace reference
33 {
34 template <typename T>
35 std::pair<float, float> mean_and_standard_deviation(const SimpleTensor<T> &in)
36 {
37  const int num_elements = in.num_elements();
38 
39  // Calculate mean
40  float mean = std::accumulate(in.data(), in.data() + num_elements, 0.f) / num_elements;
41 
42  // Calculate standard deviation
43  float std_dev = std::accumulate(in.data(), in.data() + num_elements, 0.f, [&mean](float a, float b)
44  {
45  return a + (mean - b) * (mean - b);
46  });
47 
48  std_dev = std::sqrt(std_dev / num_elements);
49 
50  return std::make_pair(mean, std_dev);
51 }
52 
53 template std::pair<float, float> mean_and_standard_deviation(const SimpleTensor<uint8_t> &in);
54 template std::pair<float, float> mean_and_standard_deviation(const SimpleTensor<half> &in);
55 template std::pair<float, float> mean_and_standard_deviation(const SimpleTensor<float> &in);
56 } // namespace reference
57 } // namespace validation
58 } // namespace test
59 } // namespace arm_compute
SimpleTensor< float > b
Definition: DFT.cpp:157
SimpleTensor< T2 > accumulate(const SimpleTensor< T1 > &src, DataType output_data_type)
Definition: Accumulate.cpp:38
Copyright (c) 2017-2021 Arm Limited.
Simple tensor object that stores elements in a consecutive chunk of memory.
Definition: SimpleTensor.h:58
int num_elements() const override
Number of elements of the tensor.
Definition: SimpleTensor.h:406
std::pair< float, float > mean_and_standard_deviation(const SimpleTensor< T > &in)
Definition: MeanStdDev.cpp:35
const T * data() const
Constant pointer to the underlying buffer.
Definition: SimpleTensor.h:418