Python* API Reference for Intel® Data Analytics Acceleration Library 2019 Update 4

pca_cor_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: pca_cor_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-PCA_CORRELATION_DENSE_ONLINE"></a>
17 ## \example pca_cor_dense_online.py
18 
19 import os
20 import sys
21 
22 import numpy as np
23 
24 from daal.algorithms import pca
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 nVectorsInBlock = 250
36 dataFileName = os.path.join(DAAL_PREFIX, 'online', 'pca_normalized.csv')
37 
38 if __name__ == "__main__":
39 
40  # Initialize FileDataSource<CSVFeatureManager> to retrieve the input data from a .csv file
41  dataSource = FileDataSource(
42  dataFileName, DataSourceIface.doAllocateNumericTable,
43  DataSourceIface.doDictionaryFromContext
44  )
45 
46  # Create an algorithm for principal component analysis using the correlation method
47  algorithm = pca.Online(fptype=np.float64)
48 
49  while(dataSource.loadDataBlock(nVectorsInBlock) == nVectorsInBlock):
50  # Set the input data to the algorithm
51  algorithm.input.setDataset(pca.data, dataSource.getNumericTable())
52 
53  # Update PCA decomposition
54  algorithm.compute()
55 
56  result = algorithm.finalizeCompute()
57 
58  # Print the results
59  printNumericTable(result.get(pca.eigenvalues), "Eigenvalues:")
60  printNumericTable(result.get(pca.eigenvectors), "Eigenvectors:")

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