C++ API Reference for Intel® Data Analytics Acceleration Library 2018 Update 2

datastructures_rowmerged.cpp

/* file: datastructures_rowmerged.cpp */
/*******************************************************************************
* Copyright 2014-2018 Intel Corporation
* All Rights Reserved.
*
* If this software was obtained under the Intel Simplified Software License,
* the following terms apply:
*
* The source code, information and material ("Material") contained herein is
* owned by Intel Corporation or its suppliers or licensors, and title to such
* Material remains with Intel Corporation or its suppliers or licensors. The
* Material contains proprietary information of Intel or its suppliers and
* licensors. The Material is protected by worldwide copyright laws and treaty
* provisions. No part of the Material may be used, copied, reproduced,
* modified, published, uploaded, posted, transmitted, distributed or disclosed
* in any way without Intel's prior express written permission. No license under
* any patent, copyright or other intellectual property rights in the Material
* is granted to or conferred upon you, either expressly, by implication,
* inducement, estoppel or otherwise. Any license under such intellectual
* property rights must be express and approved by Intel in writing.
*
* Unless otherwise agreed by Intel in writing, you may not remove or alter this
* notice or any other notice embedded in Materials by Intel or Intel's
* suppliers or licensors in any way.
*
*
* If this software was obtained under the Apache License, Version 2.0 (the
* "License"), the following terms apply:
*
* You may not use this file except in compliance with the License. You may
* obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
*
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/
/*
! Content:
! Row merged data structures example.
!******************************************************************************/
#include "daal.h"
#include "service.h"
using namespace daal;
int main()
{
std::cout << "Row merged numeric table example" << std::endl << std::endl;
const size_t nObservations1 = 5;
const size_t nObservations2 = 6;
const size_t nFeatures = 5;
const size_t firstReadRow = 3;
const size_t nRead = 6;
const size_t featureIdx = 2;
/*Example of using homogeneous numeric table*/
float data1[nFeatures * nObservations1] =
{
0.0f, 0.1f, 0.2f, 0.3f, 0.4f,
1.0f, 1.1f, 1.2f, 1.3f, 1.4f,
2.0f, 2.1f, 2.2f, 2.3f, 2.4f,
3.0f, 3.1f, 3.2f, 3.3f, 3.4f,
4.0f, 4.1f, 4.2f, 4.3f, 4.4f,
};
float data2[nFeatures * nObservations2] =
{
0.5f, 0.6f, 0.7f, 0.8f, 0.9f,
1.5f, 1.6f, 1.7f, 1.8f, 1.9f,
2.5f, 2.6f, 2.7f, 2.8f, 2.9f,
3.5f, 3.6f, 3.7f, 3.8f, 3.9f,
4.5f, 4.6f, 4.7f, 4.8f, 4.9f,
5.5f, 5.6f, 5.7f, 5.8f, 5.9f,
};
/* Create row merged numeric table consisting of two homogen numeric tables */
NumericTablePtr table1 = HomogenNumericTable<>::create(DictionaryIface::equal, data1, nFeatures, nObservations1);
checkPtr(table1.get());
NumericTablePtr table2 = HomogenNumericTable<>::create(DictionaryIface::equal, data2, nFeatures, nObservations2);
checkPtr(table2.get());
RowMergedNumericTablePtr dataTable = RowMergedNumericTable::create();
checkPtr(dataTable.get());
dataTable->addNumericTable(table1);
dataTable->addNumericTable(table2);
BlockDescriptor<> block;
/* Read one row from merged numeric table */
dataTable->getBlockOfRows(0, nObservations1 + nObservations2, readWrite, block);
printArray<float>(block.getBlockPtr(), nFeatures, block.getNumberOfRows(), "Print rows from row merged numeric table as float:");
/* Modify row of the merged numeric table */
float *row = block.getBlockPtr();
for (size_t i = 0; i < nObservations1 + nObservations2; i++) row[i * nFeatures + featureIdx] *= row[i * nFeatures + featureIdx];
dataTable->releaseBlockOfRows(block);
dataTable->getBlockOfRows(0, nObservations1 + nObservations2, readOnly, block);
printArray<float>(block.getBlockPtr(), nFeatures, block.getNumberOfRows(), "Print rows from row merged numeric table as float:");
dataTable->releaseBlockOfRows(block);
NumericTablePtr finalizedTable = data_management::convertToHomogen<float>(*dataTable);
printNumericTable(finalizedTable.get(), "Row merged table converted to homogen numeric table");
return 0;
}

For more complete information about compiler optimizations, see our Optimization Notice.