本文整理汇总了C++中Stat::getAvg方法的典型用法代码示例。如果您正苦于以下问题：C++ Stat::getAvg方法的具体用法？C++ Stat::getAvg怎么用？C++ Stat::getAvg使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Stat的用法示例。
在下文中一共展示了Stat::getAvg方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: main
//.........这里部分代码省略.........
index.init(param, rng, L);
// The accessor.
// Initialize the index structure. Note L is passed here.
cout << "CONSTRUCTING INDEX..." << endl;
timer.restart();
{
boost::progress_display progress(data.getSize());
for (int i = 0; i < data.getSize(); ++i)
{
// Insert an item to the hash table.
// Note that only the key is passed in here.
// MPLSH will get the feature from the accessor.
index.insert(i, data[i]);
++progress;
}
}
cout << boost::format("CONSTRUCTION TIME: %1%s.") % timer.elapsed() << endl;
if (use_index) {
timer.restart();
cout << "SAVING INDEX..." << endl;
{
ofstream os(index_file.c_str(), ios_base::binary);
os.exceptions(ios_base::eofbit | ios_base::failbit | ios_base::badbit);
index.save(os);
}
cout << boost::format("SAVING TIME: %1%s") % timer.elapsed() << endl;
}
}
if (do_benchmark) {
Benchmark<> bench;
cout << "LOADING BENCHMARK..." << endl;
bench.load(benchmark);
bench.resize(Q, K);
cout << "DONE." << endl;
for (unsigned i = 0; i < Q; ++i)
{
for (unsigned j = 0; j < K; ++j)
{
assert(bench.getAnswer(i)[j].key < data.getSize());
}
}
cout << "RUNNING QUERIES..." << endl;
Stat recall;
Stat cost;
metric::l2sqr<float> l2sqr(data.getDim());
TopkScanner<FloatMatrix::Accessor, metric::l2sqr<float> > query(accessor, l2sqr, K, R);
vector<Topk<unsigned> > topks(Q);
timer.restart();
if (do_recall)
// Specify the required recall
// and let MPLSH to guess how many bins to probe.
{
boost::progress_display progress(Q);
for (unsigned i = 0; i < Q; ++i)
{
// Query for one point.
query.reset(data[bench.getQuery(i)]);
index.query_recall(data[bench.getQuery(i)], desired_recall, query);
cost << double(query.cnt())/double(data.getSize());
topks[i].swap(query.topk());
++progress;
}
}
else
// specify how many bins to probe.
{
boost::progress_display progress(Q);
for (unsigned i = 0; i < Q; ++i)
{
query.reset(data[bench.getQuery(i)]);
index.query(data[bench.getQuery(i)], T, query);
cost << double(query.cnt())/double(data.getSize());
topks[i].swap(query.topk());
++progress;
}
}
for (unsigned i = 0; i < Q; ++i) {
recall << bench.getAnswer(i).recall(topks[i]);
}
cout << boost::format("QUERY TIME: %1%s.") % timer.elapsed() << endl;
cout << "[RECALL] " << recall.getAvg() << " +/- " << recall.getStd() << endl;
cout << "[COST] " << cost.getAvg() << " +/- " << cost.getStd() << endl;
}
return 0;
}示例2: main
//.........这里部分代码省略.........
if (vm.count("help") || (vm.count("data") < 1) || (vm.count("benchmark") < 1))
{
cout << desc;
return 0;
}
if (vm.count("recall") >= 1)
{
do_recall = true;
}
cout << "Loading data...";
Matrix<float> data(data_file);
cout << "done." << endl;
Benchmark<> bench(K, Q);
cout << "Loading benchmark...";
bench.load(benchmark);
cout << "done." << endl;
for (unsigned i = 0; i < Q; ++i)
{
for (unsigned j = 0; j < K; ++j)
{
assert(bench.getAnswer(i)[j].key < data.getSize());
}
}
cout << "Initializing index..." << endl;
typedef MultiProbeLshIndex<MatrixAccessor> Index;
Index::Parameter param;
param.W = W;
param.H = H;
param.M = M;
param.dim = data.getDim();
DefaultRng rng;
MatrixAccessor accessor(data);
Index index(param, rng, accessor, L);
cout << "done." << endl;
cout << "Populating index..." << endl;
timer.tick();
{
boost::progress_display progress(data.getSize());
for (unsigned i = 0; i < data.getSize(); ++i)
{
index.insert(i);
++progress;
}
}
timer.tuck("CREATE");
cout << "Running queries..." << endl;
Stat recall;
Stat cost;
Topk<unsigned> topk;
timer.tick();
if (do_recall)
{
boost::progress_display progress(Q);
for (unsigned i = 0; i < Q; ++i)
{
unsigned cnt;
topk.reset(K);
index.query(data[bench.getQuery(i)], topk, R, &cnt);
recall << bench.getAnswer(i).recall(topk);
cost << double(cnt)/double(data.getSize());
++progress;
}
}
else
{
boost::progress_display progress(Q);
for (unsigned i = 0; i < Q; ++i)
{
unsigned cnt;
topk.reset(K);
index.query(data[bench.getQuery(i)], topk, T, &cnt);
recall << bench.getAnswer(i).recall(topk);
cost << double(cnt)/double(data.getSize());
++progress;
}
}
timer.tuck("QUERY");
cout << "[RECALL] " << recall.getAvg() << " ± " << recall.getStd() << endl;
cout << "[COST] " << cost.getAvg() << " ± " << cost.getStd() << endl;
return 0;
}示例3: main
//.........这里部分代码省略.........
if (!index_loaded) {
// We define a short name for the MPLSH index.
float min = numeric_limits<float>::max();
float max = -numeric_limits<float>::max();
for (unsigned i = 0; i < data.getSize(); ++i) {
for (unsigned j = 0; j < data.getDim(); ++j) {
if (data[i][j] > max) max = data[i][j];
if (data[i][j] < min) min = data[i][j];
}
}
*/
Index::Parameter param;
// Setup the parameters. Note that L is not provided here.
param.W = W;
param.dim = data.getDim();
DefaultRng rng;
index.init(param, rng, L, H);
// The accessor.
// Initialize the index structure. Note L is passed here.
cout << "CONSTRUCTING INDEX..." << endl;
timer.restart();
{
boost::progress_display progress(data.getSize());
for (unsigned i = 0; i < data.getSize(); ++i)
{
// Insert an item to the hash table.
// Note that only the key is passed in here.
// MPLSH will get the feature from the accessor.
index.insert(i, accessor);
++progress;
}
}
cout << boost::format("CONSTRUCTION TIME: %1%s.") % timer.elapsed() << endl;
/*
if (use_index) {
timer.restart();
cout << "SAVING INDEX..." << endl;
{
ofstream os(index_file.c_str(), ios_base::binary);
os.exceptions(ios_base::eofbit | ios_base::failbit | ios_base::badbit);
index.save(os);
verify(os);
}
cout << boost::format("SAVING TIME: %1%s") % timer.elapsed() << endl;
}
}
*/
if (do_benchmark) {
Benchmark<> bench;
cout << "LOADING BENCHMARK..." << endl;
bench.load(benchmark);
bench.resize(Q, K);
cout << "DONE." << endl;
for (unsigned i = 0; i < Q; ++i)
{
for (unsigned j = 0; j < K; ++j)
{
assert(bench.getAnswer(i)[j].key < data.getSize());
}
}
cout << "RUNNING QUERIES..." << endl;
Stat recall;
Stat cost;
timer.restart();
{
TopkScanner<FloatMatrix::Accessor, metric::l2<float> > query(accessor, l2, K, R);
boost::progress_display progress(Q);
for (unsigned i = 0; i < Q; ++i)
{
query.reset(data[bench.getQuery(i)]);
index.query(data[bench.getQuery(i)], c * L, query);
recall << bench.getAnswer(i).recall(query.topk());
cost << double(query.cnt())/double(data.getSize());
++progress;
}
}
cout << boost::format("QUERY TIME: %1%s.") % timer.elapsed() << endl;
cout << "[RECALL] " << recall.getAvg() << " +/- " << recall.getStd() << endl;
cout << "[COST] " << cost.getAvg() << " +/- " << cost.getStd() << endl;
}
return 0;
}