Python* API Reference for Intel® Data Analytics Acceleration Library 2020 Update 1

svd_dense_batch.py

1 # file: svd_dense_batch.py
2 #===============================================================================
3 # Copyright 2014-2020 Intel Corporation
4 #
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at
8 #
9 # http://www.apache.org/licenses/LICENSE-2.0
10 #
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
16 #===============================================================================
17 
18 
19 
20 
21 import os
22 import sys
23 
24 from daal.algorithms import svd
25 from daal.data_management import FileDataSource, DataSourceIface
26 
27 utils_folder = os.path.realpath(os.path.abspath(os.path.dirname(os.path.dirname(__file__))))
28 if utils_folder not in sys.path:
29  sys.path.insert(0, utils_folder)
30 from utils import printNumericTable
31 
32 DAAL_PREFIX = os.path.join('..', 'data')
33 
34 # Input data set parameters
35 datasetFileName = os.path.join(DAAL_PREFIX, 'batch', 'svd.csv')
36 nRows = 16000
37 
38 if __name__ == "__main__":
39 
40  # Initialize FileDataSource<CSVFeatureManager> to retrieve input data from .csv file
41  dataSource = FileDataSource(
42  datasetFileName,
43  DataSourceIface.doAllocateNumericTable,
44  DataSourceIface.doDictionaryFromContext
45  )
46 
47  # Retrieve the data from input file
48  dataSource.loadDataBlock(nRows)
49 
50  # Create algorithm to compute SVD decomposition
51  algorithm = svd.Batch()
52 
53  algorithm.input.set(svd.data, dataSource.getNumericTable())
54 
55  # Compute SVD decomposition
56  res = algorithm.compute()
57 
58  # Print results
59  printNumericTable(res.get(svd.singularValues), "Singular values:")
60  printNumericTable(res.get(svd.rightSingularMatrix), "Right orthogonal matrix V:")
61  printNumericTable(res.get(svd.leftSingularMatrix), "Left orthogonal matrix U:", 10)

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