Examples with FailsafeLineSearchCursor com.simiacryptus.mindseye.opt.line.FailsafeLineSearchCursor used on opensource projects

Example 1 with FailsafeLineSearchCursor

use of com.simiacryptus.mindseye.opt.line.FailsafeLineSearchCursor in project MindsEye by SimiaCryptus.

the class IterativeTrainer method step.

/**
 * Step point sample.
 *
 * @param direction     the direction
 * @param directionType the direction type
 * @param previous      the previous
 * @return the point sample
 */
public PointSample step(@Nonnull final LineSearchCursor direction, final CharSequence directionType, @Nonnull final PointSample previous) {
    PointSample currentPoint;
    LineSearchStrategy lineSearchStrategy;
    if (lineSearchStrategyMap.containsKey(directionType)) {
        lineSearchStrategy = lineSearchStrategyMap.get(directionType);
    } else {
        log.info(String.format("Constructing line search parameters: %s", directionType));
        lineSearchStrategy = lineSearchFactory.apply(direction.getDirectionType());
        lineSearchStrategyMap.put(directionType, lineSearchStrategy);
    }
    @Nonnull final FailsafeLineSearchCursor wrapped = new FailsafeLineSearchCursor(direction, previous, monitor);
    lineSearchStrategy.step(wrapped, monitor).freeRef();
    currentPoint = wrapped.getBest(monitor);
    wrapped.freeRef();
    return currentPoint;
}

Example 2 with FailsafeLineSearchCursor

use of com.simiacryptus.mindseye.opt.line.FailsafeLineSearchCursor in project MindsEye by SimiaCryptus.

the class ValidatingTrainer method runStep.

/**
 * Step runStep result.
 *
 * @param previousPoint the previous point
 * @param phase         the phase
 * @return the runStep result
 */
@Nonnull
protected StepResult runStep(@Nonnull final PointSample previousPoint, @Nonnull final TrainingPhase phase) {
    currentIteration.incrementAndGet();
    @Nonnull final TimedResult<LineSearchCursor> timedOrientation = TimedResult.time(() -> phase.orientation.orient(phase.trainingSubject, previousPoint, monitor));
    final LineSearchCursor direction = timedOrientation.result;
    final CharSequence directionType = direction.getDirectionType();
    LineSearchStrategy lineSearchStrategy;
    if (phase.lineSearchStrategyMap.containsKey(directionType)) {
        lineSearchStrategy = phase.lineSearchStrategyMap.get(directionType);
    } else {
        monitor.log(String.format("Constructing line search parameters: %s", directionType));
        lineSearchStrategy = phase.lineSearchFactory.apply(direction.getDirectionType());
        phase.lineSearchStrategyMap.put(directionType, lineSearchStrategy);
    }
    @Nonnull final TimedResult<PointSample> timedLineSearch = TimedResult.time(() -> {
        @Nonnull final FailsafeLineSearchCursor cursor = new FailsafeLineSearchCursor(direction, previousPoint, monitor);
        lineSearchStrategy.step(cursor, monitor);
        @Nonnull final PointSample restore = cursor.getBest(monitor).restore();
        // cursor.step(restore.rate, monitor);
        return restore;
    });
    final PointSample bestPoint = timedLineSearch.result;
    if (bestPoint.getMean() > previousPoint.getMean()) {
        throw new IllegalStateException(bestPoint.getMean() + " > " + previousPoint.getMean());
    }
    monitor.log(compare(previousPoint, bestPoint));
    return new StepResult(previousPoint, bestPoint, new double[] { timedOrientation.timeNanos / 1e9, timedLineSearch.timeNanos / 1e9 });
}