statistics.h

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/*
 * Copyright (c) 2019-2020 Kevin Townsend (KTOWN)
 * Copyright (c) 2021 Marti Riba Pons
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef ZEPHYR_INCLUDE_ZSL_STATISTICS_H_
#define ZEPHYR_INCLUDE_ZSL_STATISTICS_H_
 
#include <zsl/zsl.h>
#include <zsl/vectors.h>
#include <zsl/matrices.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
struct zsl_sta_linreg {
    zsl_real_t slope;
    zsl_real_t intercept;
    zsl_real_t correlation;
};
 
int zsl_sta_mean(struct zsl_vec *v, zsl_real_t *m);
 
int zsl_sta_trim_mean(struct zsl_vec *v, zsl_real_t p, zsl_real_t *m);
 
int zsl_sta_weighted_mean(struct zsl_vec *v, struct zsl_vec *w, zsl_real_t *m);
 
int zsl_sta_time_weighted_mean(struct zsl_vec *v, struct zsl_vec *t,
                   zsl_real_t *m);
 
int zsl_sta_demean(struct zsl_vec *v, struct zsl_vec *w);
 
int zsl_sta_percentile(struct zsl_vec *v, zsl_real_t p, zsl_real_t *val);
 
int zsl_sta_median(struct zsl_vec *v, zsl_real_t *m);
 
int zsl_sta_weighted_median(struct zsl_vec *v, struct zsl_vec *w, zsl_real_t *m);
 
int zsl_sta_quart(struct zsl_vec *v, zsl_real_t *q1, zsl_real_t *q2,
          zsl_real_t *q3);
 
int zsl_sta_quart_range(struct zsl_vec *v, zsl_real_t *r);
 
int zsl_sta_mode(struct zsl_vec *v, struct zsl_vec *w);
 
int zsl_sta_data_range(struct zsl_vec *v, zsl_real_t *r);
 
int zsl_sta_mean_abs_dev(struct zsl_vec *v, zsl_real_t *m);
 
int zsl_sta_median_abs_dev(struct zsl_vec *v, zsl_real_t *m);
 
int zsl_sta_var(struct zsl_vec *v, zsl_real_t *var);
 
int zsl_sta_std_dev(struct zsl_vec *v, zsl_real_t *s);
 
int zsl_sta_covar(struct zsl_vec *v, struct zsl_vec *w, zsl_real_t *c);
 
int zsl_sta_covar_mtx(struct zsl_mtx *m, struct zsl_mtx *mc);
 
int zsl_sta_linear_reg(struct zsl_vec *x, struct zsl_vec *y,
               struct zsl_sta_linreg *c);
 
#ifndef CONFIG_ZSL_SINGLE_PRECISION
 
int zsl_sta_mult_linear_reg(struct zsl_mtx *x, struct zsl_vec *y,
                struct zsl_vec *b, zsl_real_t *r);
#endif
 
#ifndef CONFIG_ZSL_SINGLE_PRECISION
 
int zsl_sta_weighted_mult_linear_reg(struct zsl_mtx *x, struct zsl_vec *y,
                     struct zsl_vec *w, struct zsl_vec *b, zsl_real_t *r);
#endif
 
#ifndef CONFIG_ZSL_SINGLE_PRECISION
 
int zsl_sta_quad_fit(struct zsl_mtx *m, struct zsl_vec *b);
#endif
 
int zsl_sta_abs_err(zsl_real_t *val, zsl_real_t *exp_val, zsl_real_t *err);
 
int zsl_sta_rel_err(zsl_real_t *val, zsl_real_t *exp_val, zsl_real_t *err);
 
int zsl_sta_sta_err(struct zsl_vec *v, zsl_real_t *err);
 
#ifdef __cplusplus
}
#endif
 
#endif /* ZEPHYR_INCLUDE_ZSL_STATISTICS_H_ */
 /* End of statistics group */