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- /* Ltas_extensions.cpp
- *
- * Copyright (C) 2012-2017 David Weenink
- *
- * This code 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 2 of the License, or (at
- * your option) any later version.
- *
- * This code 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 this work. If not, see <http://www.gnu.org/licenses/>.
- */
- #include "Ltas_extensions.h"
- #include "NUM2.h"
- void Ltas_fitTiltLine (Ltas me, double fmin, double fmax, bool lnf, int method, double *a, double *b) {
- try {
- if (fmax <= fmin) {
- fmin = my xmin; fmax = my xmax;
- }
- integer ifmin, ifmax, numberOfSamples = Sampled_getWindowSamples (me, fmin, fmax, & ifmin, & ifmax);
- Melder_require (numberOfSamples > 1, U"There should be at least two data points to fit a line.");
- autoNUMvector<double> x (1, numberOfSamples);
- autoNUMvector<double> y (1, numberOfSamples);
- for (integer i = ifmin; i <= ifmax; i ++) {
- integer ixy = i - ifmin + 1;
- x [ixy] = my x1 + (i - 1) * my dx;
- if (lnf) {
- // For Ltas always x1 > 0
- x [ixy] = log10 (x [ixy]);
- }
- y [ixy] = my z [1] [i];
- }
- NUMlineFit (x.peek(), y.peek(), numberOfSamples, a, b, method);
- } catch (MelderError) {
- Melder_throw (U"Tilt line not determined.");
- }
- }
- /* End of file Ltas_extensions.cpp */
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