Python* API Reference for Intel® Data Analytics Acceleration Library 2019 Update 5

cov_dense_online.py

Deprecation Notice: With the introduction of daal4py, a package that supersedes PyDAAL, Intel is deprecating PyDAAL and will discontinue support starting with Intel® DAAL 2021 and Intel® Distribution for Python 2021. Until then Intel will continue to provide compatible pyDAAL pip and conda packages for newer releases of Intel DAAL and make it available in open source. However, Intel will not add the new features of Intel DAAL to pyDAAL. Intel recommends developers switch to and use daal4py.

Note: To find daal4py examples, refer to daal4py documentation or browse github repository.

1 # file: cov_dense_online.py
2 #===============================================================================
3 # Copyright 2014-2019 Intel Corporation.
4 #
5 # This software and the related documents are Intel copyrighted materials, and
6 # your use of them is governed by the express license under which they were
7 # provided to you (License). Unless the License provides otherwise, you may not
8 # use, modify, copy, publish, distribute, disclose or transmit this software or
9 # the related documents without Intel's prior written permission.
10 #
11 # This software and the related documents are provided as is, with no express
12 # or implied warranties, other than those that are expressly stated in the
13 # License.
14 #===============================================================================
15 
16 ## <a name="DAAL-EXAMPLE-PY-COVARIANCE_DENSE_ONLINE"></a>
17 ## \example cov_dense_online.py
18 
19 import os
20 import sys
21 
22 from daal.algorithms import covariance
23 from daal.data_management import FileDataSource, DataSourceIface
24 
25 utils_folder = os.path.realpath(os.path.abspath(os.path.dirname(os.path.dirname(__file__))))
26 if utils_folder not in sys.path:
27  sys.path.insert(0, utils_folder)
28 from utils import printNumericTable
29 
30 DAAL_PREFIX = os.path.join('..', 'data')
31 
32 # Input data set parameters
33 datasetFileName = os.path.join(DAAL_PREFIX, 'batch', 'covcormoments_dense.csv')
34 nObservations = 50
35 
36 if __name__ == "__main__":
37 
38  # Initialize FileDataSource<CSVFeatureManager> to retrieve input data from .csv file
39  dataSource = FileDataSource(
40  datasetFileName, DataSourceIface.doAllocateNumericTable,
41  DataSourceIface.doDictionaryFromContext
42  )
43 
44  # Create algorithm objects for covariance matrix computing in online mode using default method
45  algorithm = covariance.Online()
46 
47  while (dataSource.loadDataBlock(nObservations) == nObservations):
48  # Set input arguments of the algorithm
49  algorithm.input.set(covariance.data, dataSource.getNumericTable())
50 
51  # Compute partial covariance estimates
52  algorithm.compute()
53 
54  # Finalize online result and get computed covariance
55  res = algorithm.finalizeCompute()
56 
57  printNumericTable(res.get(covariance.covariance), "Covariance matrix:")
58  printNumericTable(res.get(covariance.mean), "Mean vector:")

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