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DTWSax.h
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#pragma once
#include "ViewTypes.h"
using namespace System;
using namespace System::Collections::Generic;
extern bool FileSave;
extern unsigned int SaveDirIndex;
ref class DTWSax
{
public:
static double Distance(float p_1, float p_2) {
return Math::Abs(p_1 - p_2);
}
static array<double>^ Apply(array<array<float> ^> ^p_saved_action_definition, array<array<float> ^> ^p_last_actions, array<int> ^p_data_offsets)
{
return Apply(p_saved_action_definition, p_last_actions, p_data_offsets, 999);
}
static array<double>^ Apply(array<array<float> ^> ^p_saved_action_definition, array<array<float> ^> ^p_last_actions, array<int> ^p_data_offsets, unsigned int deviate)
{
double distance = 0;
unsigned int sensor_data_index_of_saved = 0;
unsigned int sensor_data_index_of_last = p_data_offsets[0];
unsigned int diagonal_counter = 0;
float min_neighbourhood;
const unsigned int const saved_action_length = p_saved_action_definition->Length;
const unsigned int const last_action_length = p_last_actions->Length;
int i, j;
array<double> ^distances = gcnew array<double>(p_data_offsets->Length);
array<double> ^action_original_length = gcnew array<double>(p_data_offsets->Length);
array<KeyValuePair<int, int> ^> ^pDistancePath = gcnew array<KeyValuePair<int, int> ^>(saved_action_length * last_action_length);
array<float, 2> ^CMatrix = gcnew array<float, 2>(saved_action_length, last_action_length);
/*
for (int i = 0; i < saved_action_length; i++) {
p_saved_action_definition[i][0] = i;
p_last_actions[i][0] = 1;
}*/
/*
for (i = 1; i < saved_action_length; i++) {
for (j = 1; j < saved_action_length; j++) {
CMatrix[j, i] = 999999;
}
}
*/
/*
for (i = Neighborhood + 1, j = Neighborhood + 1; j < saved_action_length, i < last_action_length; i++, j++) {
CMatrix[j - Neighborhood, i] = 999999;
CMatrix[j, i - Neighborhood] = 999999;
}*/
for (int sdi = 0; sdi < p_data_offsets->Length; sdi++) {
sensor_data_index_of_last = p_data_offsets[sdi];
sensor_data_index_of_saved = sdi;
//sensor_data_index_of_last = sdi;
CMatrix[0, 0] = Distance(p_saved_action_definition[0][sensor_data_index_of_saved], p_last_actions[0][sensor_data_index_of_last]);
for (int i = 1; i < last_action_length; i++) {
CMatrix[0, i] = Distance(p_saved_action_definition[0][sensor_data_index_of_saved], p_last_actions[i][sensor_data_index_of_last]) + CMatrix[0, i - 1];
}
for (int j = 1; j < saved_action_length; j++) {
CMatrix[j, 0] = Distance(p_saved_action_definition[j][sensor_data_index_of_saved], p_last_actions[0][sensor_data_index_of_last]) + CMatrix[j - 1, 0];
}
/* C[0, 0] */
CMatrix[0, 0] = Distance(p_saved_action_definition[0][sensor_data_index_of_saved], p_last_actions[0][sensor_data_index_of_last]);
/* END - C[0, 0] */
/* C[1, 1] */
CMatrix[1, 1] = Distance(p_saved_action_definition[1][sensor_data_index_of_saved], p_last_actions[1][sensor_data_index_of_last]);
min_neighbourhood = CMatrix[0, 0];
if (CMatrix[0, 1] < min_neighbourhood) {
min_neighbourhood = CMatrix[0, 1];
}
if (CMatrix[1, 0] < min_neighbourhood)
{
min_neighbourhood = CMatrix[1, 0];
}
CMatrix[1, 1] = CMatrix[1, 1] + min_neighbourhood;
/* END - C[1, 1] */
diagonal_counter = saved_action_length;
for (j = 1; j < saved_action_length; j++)
{
for (i = 1; i < last_action_length; i++)
{
CMatrix[j, i] = Distance(p_saved_action_definition[j][sensor_data_index_of_saved], p_last_actions[i][sensor_data_index_of_last]);
min_neighbourhood = CMatrix[j - 1, i - 1];
if (CMatrix[j - 1, i] < min_neighbourhood) {
min_neighbourhood = CMatrix[j - 1, i];
}
if (CMatrix[j, i - 1] < min_neighbourhood)
{
min_neighbourhood = CMatrix[j, i - 1];
}
CMatrix[j, i] = CMatrix[j, i] + min_neighbourhood;
}
}
j = saved_action_length - 1;
i = last_action_length - 1;
int distance_counter = 0;
int temp_i_decrement, temp_j_decrement;
int dtw_range = saved_action_length + saved_action_length * 0.30f;
double dtw_distance = 0;
while (i >= 0 && j >= 0) {
KeyValuePair<int, int> ^p_kvp = KeyValuePair<int, int>(j + 1, i + 1);
pDistancePath[distance_counter] = p_kvp;
distance_counter++;
if (distance_counter > dtw_range) {
//distance = 9999999;
//break;
}
action_original_length[sdi] = action_original_length[sdi] + Math::Pow(p_saved_action_definition[j][sensor_data_index_of_saved], 2);
temp_i_decrement = 1;
temp_j_decrement = 1;
//distance = distance + CMatrix[j, i];
double current_diff = Math::Abs(p_saved_action_definition[j][sensor_data_index_of_saved] - p_last_actions[i][sensor_data_index_of_last]);
if (0.001 < Math::Abs(current_diff)){
if (Math::Abs(p_saved_action_definition[j][sensor_data_index_of_saved]) > 1.5 || Math::Abs(p_last_actions[i][sensor_data_index_of_last]) > 1.5) {
current_diff = current_diff * 1.5;
}
}
dtw_distance = dtw_distance + current_diff;
if (i != 0 && j != 0) {
min_neighbourhood = CMatrix[j - 1, i - 1];
if (Math::Abs(j - (i - 1)) <= deviate) {
if (CMatrix[j, i - 1] < min_neighbourhood) {
min_neighbourhood = CMatrix[j, i - 1];
temp_i_decrement = 1;
temp_j_decrement = 0;
}
}
if (Math::Abs((j - 1) - i) <= deviate) {
if (CMatrix[j - 1, i] < min_neighbourhood) {
min_neighbourhood = CMatrix[j - 1, i];
temp_i_decrement = 0;
temp_j_decrement = 1;
}
}
}
else if (i == 0 && j == 0) {
break;
}
else if (i == 0) {
min_neighbourhood = CMatrix[j - 1, i];
temp_i_decrement = 0;
temp_j_decrement = 1;
}
else if (j == 0) {
min_neighbourhood = CMatrix[j, i - 1];
temp_i_decrement = 1;
temp_j_decrement = 0;
}
i = i - temp_i_decrement;
j = j - temp_j_decrement;
}
distance = distance + dtw_distance * ((sdi + 1) / (float)p_data_offsets->Length);
if (FileSave) {
SaveDirIndex++;
String ^dir = gcnew String(Environment::CurrentDirectory + "\\SensorData\\Signals\\" + SaveDirIndex.ToString() + "DTWSax");
if (!IO::Directory::Exists(dir)) {
IO::Directory::CreateDirectory(dir);
}
/****************************/
String ^path = gcnew String(dir + "\\saved_action.txt");
System::IO::TextWriter ^pTextWriter;
if (!IO::File::Exists(path)) {
pTextWriter = gcnew System::IO::StreamWriter(path, true);
pTextWriter->Flush();
}
for (j = 0; j < saved_action_length; j++) {
pTextWriter->Write(p_saved_action_definition[j][sensor_data_index_of_saved] + "\t");
}
pTextWriter->Flush();
pTextWriter->Close();
/****************************/
path = gcnew String(dir + "\\last_action.txt");
if (!IO::File::Exists(path)) {
pTextWriter = gcnew System::IO::StreamWriter(path, true);
pTextWriter->Flush();
}
for (j = 0; j < last_action_length; j++) {
pTextWriter->Write(p_last_actions[j][sensor_data_index_of_last] + "\t");
}
pTextWriter->Flush();
pTextWriter->Close();
/************DISTANCE****************/
path = gcnew String(dir + "\\distance.txt");
if (!IO::File::Exists(path)) {
pTextWriter = gcnew System::IO::StreamWriter(path, true);
pTextWriter->Flush();
}
for (j = 0; j < saved_action_length; j++) {
pTextWriter->Write(distance + "\t");
}
pTextWriter->Flush();
pTextWriter->Close();
/****************************/
path = gcnew String(dir + "\\distance_path_ij.txt");
if (!IO::File::Exists(path)) {
pTextWriter = gcnew System::IO::StreamWriter(path, true);
pTextWriter->Flush();
}
for (int i = 0; i < pDistancePath->Length; i++) {
if (pDistancePath[i] != nullptr) {
pTextWriter->Write(pDistancePath[i]->Key + "\t");
}
}
pTextWriter->Flush();
pTextWriter->Close();
/****************************/
path = gcnew String(dir + "\\distance_path_ix.txt");
if (!IO::File::Exists(path)) {
pTextWriter = gcnew System::IO::StreamWriter(path, true);
pTextWriter->Flush();
}
for (int i = 0; i < pDistancePath->Length; i++) {
if (pDistancePath[i] != nullptr) {
pTextWriter->Write(pDistancePath[i]->Value + "\t");
}
}
pTextWriter->Flush();
pTextWriter->Close();
/****************************/
path = gcnew String(dir + "\\CMatrix.txt");
if (!IO::File::Exists(path)) {
pTextWriter = gcnew System::IO::StreamWriter(path, true);
pTextWriter->Flush();
}
for (j = 0; j < saved_action_length; j++) {
for (i = 0; i < last_action_length; i++) {
pTextWriter->Write(CMatrix[j, i] + "\t");
}
pTextWriter->WriteLine();
}
pTextWriter->Flush();
pTextWriter->Close();
}
distances[sdi] = Math::Sqrt(distance);
distance = 0;
}
return distances;
}
};