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# Copyright 2014-2019 Intel Corporation
# All Rights Reserved.
# This software is licensed 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
# 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.
# daal4py low order moments example for distributed memory systems; SPMD mode
# run like this:
# mpirun -n 4 python ./
import daal4py as d4p
import numpy as np
# let's use a reading of file in chunks (defined in
from spmd_utils import read_csv, get_chunk_params
def main():
infile = "./data/batch/covcormoments_dense.csv"
# We know the number of lines in the file and use this to separate data between processes
skiprows, nrows = get_chunk_params(lines_count=200,
# Each process reads its chunk of the file
data = read_csv(infile, sr=skiprows, nr=nrows)
# Create algorithm with distributed mode
alg = d4p.low_order_moments(method='defaultDense', distributed=True)
# Perform computation
res = alg.compute(data)
# result provides minimum, maximum, sum, sumSquares, sumSquaresCentered,
# mean, secondOrderRawMoment, variance, standardDeviation, variation
assert(all(getattr(res, name).shape==(1, data.shape[1]) for name in
['minimum', 'maximum', 'sum', 'sumSquares', 'sumSquaresCentered', 'mean',
'secondOrderRawMoment', 'variance', 'standardDeviation', 'variation']))
return res
if __name__ == "__main__":
# Initialize SPMD mode
res = main()
# result is available on all processes - but we print only on root
if d4p.my_procid() == 0:
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