KernelFunctionRbfCSRBatch.java

/* file: KernelFunctionRbfCSRBatch.java */
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/*
 //  Content:
 //     Java example of computing a radial basis function (RBF) kernel
 */

package com.intel.daal.examples.kernel_function;

import com.intel.daal.algorithms.kernel_function.InputId;
import com.intel.daal.algorithms.kernel_function.ResultId;
import com.intel.daal.data_management.data.CSRNumericTable;
import com.intel.daal.data_management.data_source.DataSource;
import com.intel.daal.data_management.data_source.FileDataSource;
import com.intel.daal.examples.utils.Service;
import com.intel.daal.services.DaalContext;

class KernelFunctionRbfCSRBatch {
    /* Input data set parameters */
    private static final String leftDatasetFileName  = "../data/batch/kernel_function_csr.csv";
    private static final String rightDatasetFileName = "../data/batch/kernel_function_csr.csv";

    private static final double sigma = 1.0;   /* RBF kernel coefficient */

    private static DaalContext context = new DaalContext();

    public static void main(String[] args) throws java.io.FileNotFoundException, java.io.IOException {
        /* Read a data set from a file and create a numeric tables for storing the input data */
        CSRNumericTable leftData  = Service.createSparseTable(context, leftDatasetFileName);
        CSRNumericTable rightData = Service.createSparseTable(context, rightDatasetFileName);

        /* Create an algorithm */
        com.intel.daal.algorithms.kernel_function.rbf.Batch algorithm = new com.intel.daal.algorithms.kernel_function.rbf.Batch(
            context, Double.class, com.intel.daal.algorithms.kernel_function.rbf.Method.fastCSR);

        /* Set the kernel algorithm parameter */
        algorithm.parameter.setSigma(sigma);
        algorithm.parameter.setComputationMode(com.intel.daal.algorithms.kernel_function.ComputationMode.matrixMatrix);

        /* Set an input data table for the algorithm */
        algorithm.input.set(InputId.X, leftData);
        algorithm.input.set(InputId.Y, rightData);

        /* Compute the RBF kernel */
        com.intel.daal.algorithms.kernel_function.rbf.Result result = algorithm.compute();

        /* Print the results */
        Service.printNumericTable("Result of kernel function:", result.get(ResultId.values));

        context.dispose();
    }
}