Java* API Reference for Intel® Data Analytics Acceleration Library 2019

LogisticLayerDenseBatch.java

/* file: LogisticLayerDenseBatch.java */
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/*
// Content:
// Java example of forward and backward logistic layer usage
*/
package com.intel.daal.examples.neural_networks;
import com.intel.daal.algorithms.neural_networks.layers.logistic.*;
import com.intel.daal.algorithms.neural_networks.layers.ForwardResultId;
import com.intel.daal.algorithms.neural_networks.layers.ForwardResultLayerDataId;
import com.intel.daal.algorithms.neural_networks.layers.ForwardInputId;
import com.intel.daal.algorithms.neural_networks.layers.BackwardResultId;
import com.intel.daal.algorithms.neural_networks.layers.ForwardResultId;
import com.intel.daal.algorithms.neural_networks.layers.BackwardInputId;
import com.intel.daal.algorithms.neural_networks.layers.BackwardInputLayerDataId;
import com.intel.daal.data_management.data.Tensor;
import com.intel.daal.data_management.data.HomogenTensor;
import com.intel.daal.examples.utils.Service;
import com.intel.daal.services.DaalContext;
class LogisticLayerDenseBatch {
private static final String datasetFileName = "../data/batch/layer.csv";
private static DaalContext context = new DaalContext();
public static void main(String[] args) throws java.io.FileNotFoundException, java.io.IOException {
/* Read datasetFileName from a file and create a tensor to store forward input data */
Tensor tensorData = Service.readTensorFromCSV(context, datasetFileName);
/* Create an algorithm to compute forward logistic layer results using default method */
LogisticForwardBatch logisticLayerForward = new LogisticForwardBatch(context, Float.class, LogisticMethod.defaultDense);
/* Set input objects for the forward logistic layer */
logisticLayerForward.input.set(ForwardInputId.data, tensorData);
/* Compute the forward logistic layer results */
LogisticForwardResult forwardResult = logisticLayerForward.compute();
/* Print the results of the forward logistic layer */
Service.printTensor("Forward logistic layer result (first 5 rows):", forwardResult.get(ForwardResultId.value), 5, 0);
/* Get the size of forward logistic layer output */
int nSize = (int)forwardResult.get(ForwardResultId.value).getSize();
long[] dims = forwardResult.get(ForwardResultId.value).getDimensions();
/* Create a tensor with backward input data */
double[] data = new double[nSize];
Tensor tensorDataBack = new HomogenTensor(context, dims, data, 0.01);
/* Create an algorithm to compute backward logistic layer results using default method */
LogisticBackwardBatch logisticLayerBackward = new LogisticBackwardBatch(context, Float.class, LogisticMethod.defaultDense);
/* Set input objects for the backward logistic layer */
logisticLayerBackward.input.set(BackwardInputId.inputGradient, tensorDataBack);
logisticLayerBackward.input.set(BackwardInputLayerDataId.inputFromForward, forwardResult.get(ForwardResultLayerDataId.resultForBackward));
/* Compute backward logistic layer results */
LogisticBackwardResult backwardResult = logisticLayerBackward.compute();
/* Print the results of the backward logistic layer */
Service.printTensor("Backward logistic layer result (first 5 rows):", backwardResult.get(BackwardResultId.gradient), 5, 0);
context.dispose();
}
}

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