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benchmark/python/sparse/util.py
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cclauss
xrange(10) --> range(10) for Python 3 (#11673)
13 июл 2018, 03:57
13 июл 2018, 03:57
6b2cbd4
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# Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you under the Apache License, Version 2.0 (the # "License"); you may not use this file except in compliance # with the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # 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. import os import random def estimate_density(DATA_PATH, feature_size): """sample 10 times of a size of 1000 for estimating the density of the sparse dataset""" if not os.path.exists(DATA_PATH): raise Exception("Data is not there!") density = [] P = 0.01 for _ in range(10): num_non_zero = 0 num_sample = 0 with open(DATA_PATH) as f: for line in f: if (random.random() < P): num_non_zero += len(line.split(" ")) - 1 num_sample += 1 density.append(num_non_zero * 1.0 / (feature_size * num_sample)) return sum(density) / len(density)