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

datastructures_merged.py

1 # file: datastructures_merged.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 
17 
18 
19 import os
20 import sys
21 
22 import numpy as np
23 
24 from daal.data_management import (
25  HomogenNumericTable, MergedNumericTable, BlockDescriptor, readWrite, readOnly
26 )
27 
28 utils_folder = os.path.realpath(os.path.abspath(os.path.dirname(os.path.dirname(__file__))))
29 if utils_folder not in sys.path:
30  sys.path.insert(0, utils_folder)
31 from utils import printArray
32 
33 
34 if __name__ == "__main__":
35 
36  print("Merged numeric table example\n")
37 
38  nFeatures1 = 5
39  nFeatures2 = 6
40  firstReadRow = 3
41  nRead = 1
42 
43  # Example of using homogeneous numeric table
44  data1 = np.array([
45  (0.0, 0.1, 0.2, 0.3, 0.4),
46  (1.0, 1.1, 1.2, 1.3, 1.4),
47  (2.0, 2.1, 2.2, 2.3, 2.4),
48  (3.0, 3.1, 3.2, 3.3, 3.4),
49  (4.0, 4.1, 4.2, 4.3, 4.4),
50  ])
51 
52  data2 = np.array([
53  (0.5, 0.6, 0.7, 0.8, 0.9, 1),
54  (1.5, 1.6, 1.7, 1.8, 1.9, 2),
55  (2.5, 2.6, 2.7, 2.8, 2.9, 3),
56  (3.5, 3.6, 3.7, 3.8, 3.9, 4),
57  (4.5, 4.6, 4.7, 4.8, 4.9, 5),
58  ])
59 
60  # Create two homogen numeric tables from data arrays
61  dataTable1 = HomogenNumericTable(data1)
62  dataTable2 = HomogenNumericTable(data2)
63 
64  # Create merged numeric table consisting of two homogen numeric tables
65  dataTable = MergedNumericTable()
66  dataTable.addNumericTable(dataTable1)
67  dataTable.addNumericTable(dataTable2)
68 
69  block = BlockDescriptor()
70 
71  # Read one row from merged numeric table
72  dataTable.getBlockOfRows(firstReadRow, nRead, readWrite, block)
73  printArray(
74  block.getArray(), nFeatures1 + nFeatures2, block.getNumberOfRows(),
75  block.getNumberOfColumns(), "Print 1 row from merged numeric table as double:"
76  )
77 
78  # Modify row of the merged numeric table
79  row = block.getArray()
80  for i in range(nFeatures1 + nFeatures2):
81  row[0][i] *= row[0][i]
82  dataTable.releaseBlockOfRows(block)
83 
84  # Read the same row from homogen numeric tables
85  dataTable1.getBlockOfRows(firstReadRow, nRead, readOnly, block)
86  printArray(
87  block.getArray(), nFeatures1, block.getNumberOfRows(),
88  block.getNumberOfColumns(), "Print 1 row from first homogen numeric table as double:"
89  )
90  dataTable1.releaseBlockOfRows(block)
91 
92  dataTable2.getBlockOfRows(firstReadRow, nRead, readOnly, block)
93  printArray(
94  block.getArray(), nFeatures2, block.getNumberOfRows(),
95  block.getNumberOfColumns(), "Print 1 row from second homogen numeric table as double:"
96  )
97  dataTable2.releaseBlockOfRows(block)

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