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src/bin/matrix-sum-rows.cc
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// bin/matrix-sum-rows.cc
// Copyright 2012 Johns Hopkins University (author: Daniel Povey)
// See ../../COPYING for clarification regarding multiple authors
//
// Licensed 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
//
// THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
// WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
// MERCHANTABLITY OR NON-INFRINGEMENT.
// See the Apache 2 License for the specific language governing permissions and
// limitations under the License.
#include "base/kaldi-common.h"
#include "util/common-utils.h"
#include "matrix/kaldi-matrix.h"
int main(int argc, char *argv[]) {
try {
using namespace kaldi;
const char *usage =
"Sum the rows of an input table of matrices and output the corresponding
"
"table of vectors
"
"
"
"Usage: matrix-sum-rows [options] <matrix-rspecifier> <vector-wspecifier>
"
"e.g.: matrix-sum-rows ark:- ark:- | vector-sum ark:- sum.vec
"
"See also: matrix-sum, vector-sum
";
ParseOptions po(usage);
po.Read(argc, argv);
if (po.NumArgs() != 2) {
po.PrintUsage();
exit(1);
}
std::string rspecifier = po.GetArg(1);
std::string wspecifier = po.GetArg(2);
SequentialBaseFloatMatrixReader mat_reader(rspecifier);
BaseFloatVectorWriter vec_writer(wspecifier);
int32 num_done = 0;
int64 num_rows_done = 0;
for (; !mat_reader.Done(); mat_reader.Next()) {
std::string key = mat_reader.Key();
Matrix<double> mat(mat_reader.Value());
Vector<double> vec(mat.NumCols());
vec.AddRowSumMat(1.0, mat, 0.0);
// Do the summation in double, to minimize roundoff.
Vector<BaseFloat> float_vec(vec);
vec_writer.Write(key, float_vec);
num_done++;
num_rows_done += mat.NumRows();
}
KALDI_LOG << "Summed rows " << num_done << " matrices, "
<< num_rows_done << " rows in total.";
return (num_done != 0 ? 0 : 1);
} catch(const std::exception &e) {
std::cerr << e.what();
return -1;
}
}
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