Zabbix

/*

** Zabbix

** Copyright (C) 2001-2023 Zabbix SIA

**

** 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 2 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.

**/

​

#include "anomalystl.h"

​

#include "zbxnum.h"

#include "log.h"

#include "zbxeval.h"

​

ZBX_PTR_VECTOR_DECL(VV, zbx_vector_history_record_t *)

ZBX_PTR_VECTOR_IMPL(VV, zbx_vector_history_record_t *)

​

/*******************************************************************************

 *                                                                             *

 * Purpose: finds how many values in stl remainder are outliers                *

 *                                                                             *

 * Parameters:  remainder        - [IN] stl remainder values vector            *

 *              deviations_count - [IN] how much a value can be away from the  *

 *                                      (mad, stdevsamp or stdevpop) to get    *

 *                                      counted as an outlier                  *

 *                        devalg - [IN] function (mad, stdevsamp or stdevpop)  *

 *                                      to evaluate a single deviation unit    *

 *           detect_period_start - [IN] evaluate number of deviations in       *

 *                                      remainder starting from this time      *

 *                 detect_period - [IN] evaluate number of deviations in       *

 *                                      remainder until this time              *

 *                        result - [OUT] result - double, a percentage how     *

 *                                       many outliers are in remainder        *

 *                         error - [OUT] the error message                     *

 *                                                                             *

 * Return value: SUCCEED - evaluated successfully, 'result' contains new value *

 *               FAIL - evaluation failed, 'result' contains old value         *

 *                                                                             *

 *******************************************************************************/

int zbx_get_percentage_of_deviations_in_stl_remainder(const zbx_vector_history_record_t *remainder,

        double deviations_count, const char* devalg, int detect_period_start, int detect_period_end,

        double *result, char **error)

{

    int         i, total_values_count = 0, deviations_detected_count = 0, ret = FAIL;

    double          remainder_deviation, deviation_limit;

    zbx_statistical_func_t  stat_func;

    zbx_vector_dbl_t    remainder_values_dbl;

​

    zbx_vector_dbl_create(&remainder_values_dbl);

​

    if (0 == remainder->values_num)

    {