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/* statistics/gastwirth_source.c
*
* Copyright (C) 2018 Patrick Alken
*
* This program 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.
*
* This program 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 program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
double
FUNCTION(gsl_stats,gastwirth_from_sorted_data) (const BASE sorted_data[],
const size_t stride,
const size_t n)
{
if (n == 0)
{
return 0.0;
}
else
{
double a = FUNCTION(gsl_stats,quantile_from_sorted_data)(sorted_data, stride, n, 1.0 / 3.0);
double b = FUNCTION(gsl_stats,median_from_sorted_data)(sorted_data, stride, n);
double c = FUNCTION(gsl_stats,quantile_from_sorted_data)(sorted_data, stride, n, 2.0 / 3.0);
double gastwirth = 0.3 * a + 0.4 * b + 0.3 * c;
return gastwirth;
}
}
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