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/*
Copyright 2008 Brain Research Institute, Melbourne, Australia
Written by J-Donald Tournier, 27/06/08.
This file is part of MRtrix.
MRtrix is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
MRtrix is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with MRtrix. If not, see <http://www.gnu.org/licenses/>.
*/
#include <glibmm/stringutils.h>
#include <fstream>
#include "ptr.h"
#include "math/matrix.h"
namespace MR {
namespace Math {
void Matrix::load (const String& filename)
{
std::ifstream in (filename.c_str());
if (!in) throw Exception ("cannot open matrix file \"" + filename + "\": " + Glib::strerror (errno));
std::vector< RefPtr< std::vector<double> > > data;
do {
String sbuf;
getline (in, sbuf);
if (in.bad()) throw Exception ("error reading matrix file \"" + filename + "\": " + Glib::strerror (errno));
sbuf = strip (sbuf.substr (0, sbuf.find_first_of ('#')));
if (sbuf.size()) {
data.push_back (RefPtr< std::vector<double> > (new std::vector<double>));
std::istringstream stream (sbuf);
do {
double val;
stream >> val;
data.back()->push_back (val);
} while (stream.good());
if (data.size() > 1)
if (data.back()->size() != data[0]->size())
throw Exception ("uneven rows in matrix file \"" + filename + "\"");
}
} while (in.good());
allocate (data.size(), data[0]->size());
for (guint i = 0; i < rows(); i++)
for (guint j = 0; j < columns(); j++)
(*this)(i, j) = (*data[i])[j];
}
void Matrix::save (const String& filename) const
{
std::ofstream out (filename.c_str());
if (!out) throw Exception ("cannot open matrix file \"" + filename + "\": " + Glib::strerror (errno));
for (guint i = 0; i < rows(); i++) {
for (guint j = 0; j < columns(); j++)
out << (*this)(i,j) << "\t";
out << "\n";
}
}
std::ostream& operator<< (std::ostream& stream, const Matrix& M)
{
for (guint i = 0; i < M.rows(); i++) {
for (guint j = 0; j < M.columns(); j++)
stream << MR::printf ("%11.4g ", M(i,j));
stream << "\n";
}
return (stream);
}
}
}
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