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seq.cpp
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seq.cpp
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#include <iostream>
#include <string>
#include "utils/util.h"
#include "utils/heap.h"
#include "utils/utimer.cpp"
using namespace std;
int main(int argc, char *argv[])
{
if (argc < 3)
{
cerr << "Usage: " << argv[0] << " <K> <input_file>" << endl;
cerr << "K \t hyperparameter for KNN" << endl;
cerr << "input_file, \t name of a file in the subdirectory 'input'" << endl;
exit(-1);
}
int k = atoi(argv[1]);
string filename = "input/" + string(argv[2]);
vector <Point> points;
string toWrite = "";
{
utimer t1("READ");
points = readPoints(filename);
}
int size = points.size();
{
utimer t2("KNN");
Heap mh(k);
for (int i = 0; i < size; i++)
{
for (int j = 0; j < size; j++)
{
if (i == j)
continue;
float ed = points[i].squaredEuclideanDistance(points[j]);
mh.push(make_pair(j, ed));
}
toWrite.append(writeNeighbours(make_pair(i, mh.finalize())));
// clean for next step
mh.clear();
cout << "\r" << "Done " << i + 1 << "/" << size << flush;
}
cout << endl;
}
{
utimer t3("WRITE");
string filename = "seq_res.txt";
ofstream out(filename);
if (!out.is_open())
{
cerr << "Can't open file " << filename << endl;
exit(-1);
}
out << toWrite << endl;
out.close();
}
return 0;
}