107 lines
3.2 KiB
C++
107 lines
3.2 KiB
C++
/**
|
|
* @file snapshot_ensembles.cpp
|
|
* @author Marcus Edel
|
|
* @author Conrad Sanderson
|
|
*
|
|
* ensmallen is free software; you may redistribute it and/or modify it under
|
|
* the terms of the 3-clause BSD license. You should have received a copy of
|
|
* the 3-clause BSD license along with ensmallen. If not, see
|
|
* http://www.opensource.org/licenses/BSD-3-Clause for more information.
|
|
*/
|
|
|
|
#include <ensmallen.hpp>
|
|
#include "catch.hpp"
|
|
#include "test_function_tools.hpp"
|
|
|
|
using namespace ens;
|
|
using namespace ens::test;
|
|
|
|
/*
|
|
* Test that the step size resets after a specified number of epochs.
|
|
*/
|
|
TEST_CASE("SnapshotEnsemblesResetTest","[SnapshotEnsemblesTest]")
|
|
{
|
|
const double stepSize = 0.5;
|
|
arma::mat iterate;
|
|
|
|
// Now run cyclical decay policy with a couple of multiplicators and initial
|
|
// restarts.
|
|
for (size_t restart = 5; restart < 100; restart += 10)
|
|
{
|
|
for (size_t mult = 2; mult < 5; ++mult)
|
|
{
|
|
double epochStepSize = stepSize;
|
|
|
|
SnapshotEnsembles snapshotEnsembles(restart,
|
|
double(mult), stepSize, 1000, 2);
|
|
SnapshotEnsembles::Policy<arma::mat, arma::mat> p(snapshotEnsembles);
|
|
|
|
snapshotEnsembles.EpochBatches() = 10 / (double)1000;
|
|
// Create all restart epochs.
|
|
arma::Col<size_t> nextRestart(1000 / 10 / mult);
|
|
nextRestart(0) = restart;
|
|
for (size_t j = 1; j < nextRestart.n_elem; ++j)
|
|
nextRestart(j) = nextRestart(j - 1) * mult;
|
|
|
|
for (size_t i = 0; i < 1000; ++i)
|
|
{
|
|
p.Update(iterate, epochStepSize, iterate);
|
|
if (i <= restart || arma::accu(arma::find(nextRestart == i)) > 0)
|
|
{
|
|
REQUIRE(epochStepSize == stepSize);
|
|
}
|
|
}
|
|
|
|
REQUIRE(p.Snapshots().size() == 2);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Run SGDR with snapshot ensembles on logistic regression and make sure the
|
|
* results are acceptable.
|
|
*/
|
|
TEST_CASE("SnapshotEnsemblesLogisticRegressionTest","[SnapshotEnsemblesTest]")
|
|
{
|
|
// Run SGDR with snapshot ensembles on a couple of batch sizes.
|
|
for (size_t batchSize = 5; batchSize < 50; batchSize += 5)
|
|
{
|
|
SnapshotSGDR<> sgdr(50, 2.0, batchSize, 0.01, 10000, 1e-3);
|
|
LogisticRegressionFunctionTest(sgdr, 0.003, 0.006);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Run SGDR with snapshot ensembles on logistic regression and make sure the
|
|
* results are acceptable. Use arma::fmat.
|
|
*/
|
|
TEST_CASE("SnapshotEnsemblesLogisticRegressionFMatTest","[SnapshotEnsemblesTest]")
|
|
{
|
|
// Run SGDR with snapshot ensembles on a couple of batch sizes.
|
|
for (size_t batchSize = 5; batchSize < 50; batchSize += 5)
|
|
{
|
|
SnapshotSGDR<> sgdr(50, 2.0, batchSize, 0.01, 10000, 1e-3);
|
|
LogisticRegressionFunctionTest<arma::fmat>(sgdr, 0.03, 0.06, 3);
|
|
}
|
|
}
|
|
|
|
#if ARMA_VERSION_MAJOR > 9 ||\
|
|
(ARMA_VERSION_MAJOR == 9 && ARMA_VERSION_MINOR >= 400)
|
|
|
|
/**
|
|
* Run SGDR with snapshot ensembles on logistic regression and make sure the
|
|
* results are acceptable. Use arma::sp_mat.
|
|
*/
|
|
TEST_CASE("SnapshotEnsemblesLogisticRegressionSpMatTest",
|
|
"[SnapshotEnsemblesTest]")
|
|
{
|
|
// Run SGDR with snapshot ensembles on a couple of batch sizes.
|
|
for (size_t batchSize = 5; batchSize < 50; batchSize += 5)
|
|
{
|
|
SnapshotSGDR<> sgdr(50, 2.0, batchSize, 0.01, 10000, 1e-3);
|
|
LogisticRegressionFunctionTest<arma::sp_mat>(sgdr, 0.003, 0.006);
|
|
}
|
|
}
|
|
|
|
#endif
|