68 lines
2.3 KiB
C++
68 lines
2.3 KiB
C++
/*******************************************************************************
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* Copyright (c) 2015-2018 Skymind, Inc.
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*
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* This program and the accompanying materials are made available under the
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* terms of the Apache License, Version 2.0 which is available at
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* https://www.apache.org/licenses/LICENSE-2.0.
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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* SPDX-License-Identifier: Apache-2.0
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******************************************************************************/
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//
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// @author Yurii Shyrma (iuriish@yahoo.com), created on 31.08.2018
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//
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#include <ops/declarable/helpers/histogramFixedWidth.h>
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namespace sd {
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namespace ops {
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namespace helpers {
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template <typename T>
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void histogramFixedWidth_(const NDArray& input, const NDArray& range, NDArray& output) {
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const int nbins = output.lengthOf();
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// firstly initialize output with zeros
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output.nullify();
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const T leftEdge = range.e<double>(0);
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const T rightEdge = range.e<double>(1);
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const T binWidth = (rightEdge - leftEdge ) / nbins;
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const T secondEdge = leftEdge + binWidth;
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const T lastButOneEdge = rightEdge - binWidth;
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Nd4jLong inputLength = input.lengthOf();
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// FIXME: make this one parallel without CRITICAL section
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for(Nd4jLong i = 0; i < inputLength; ++i) {
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const T value = input.e<T>(i);
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if(value < secondEdge) {
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output.p<Nd4jLong>(0, output.e<Nd4jLong>(0) + 1);
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} else if(value >= lastButOneEdge) {
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output.p<Nd4jLong>(nbins - 1, output.e<Nd4jLong>(nbins - 1) + 1);
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} else {
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Nd4jLong currInd = static_cast<Nd4jLong>((value - leftEdge) / binWidth);
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output.p<Nd4jLong>(currInd, output.e<Nd4jLong>(currInd) + 1);
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}
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}
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}
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void histogramFixedWidth(sd::LaunchContext * context, const NDArray& input, const NDArray& range, NDArray& output) {
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BUILD_SINGLE_SELECTOR(input.dataType(), histogramFixedWidth_, (input, range, output), LIBND4J_TYPES);
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}
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BUILD_SINGLE_TEMPLATE(template void histogramFixedWidth_, (const NDArray& input, const NDArray& range, NDArray& output), LIBND4J_TYPES);
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}
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}
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} |