ref: b273a40041a0330bd1545316eed63959a6cc4bdd
dir: /include/cst_ss.h/
/*************************************************************************/
/* */
/* Language Technologies Institute */
/* Carnegie Mellon University */
/* Copyright (c) 2001 */
/* All Rights Reserved. */
/* */
/* Permission is hereby granted, free of charge, to use and distribute */
/* this software and its documentation without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of this work, and to */
/* permit persons to whom this work is furnished to do so, subject to */
/* the following conditions: */
/* 1. The code must retain the above copyright notice, this list of */
/* conditions and the following disclaimer. */
/* 2. Any modifications must be clearly marked as such. */
/* 3. Original authors' names are not deleted. */
/* 4. The authors' names are not used to endorse or promote products */
/* derived from this software without specific prior written */
/* permission. */
/* */
/* CARNEGIE MELLON UNIVERSITY AND THE CONTRIBUTORS TO THIS WORK */
/* DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING */
/* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT */
/* SHALL CARNEGIE MELLON UNIVERSITY NOR THE CONTRIBUTORS BE LIABLE */
/* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES */
/* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN */
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/* THIS SOFTWARE. */
/* */
/*************************************************************************/
/* Author: Alan W Black (awb@cs.cmu.edu) */
/* Date: November 2001 */
/*************************************************************************/
/* */
/* sufficient statitsics */
/* */
/*************************************************************************/
#ifndef _CST_SS_H__
#define _CST_SS_H__
typedef struct cst_ss_struct {
double num_samples;
double sum;
double sumx;
} cst_ss;
cst_ss *new_ss();
void delete_ss(cst_ss *ss);
void ss_reset(cst_ss *ss);
double ss_mean(cst_ss *ss);
double ss_variance(cst_ss *ss);
double ss_stddev(cst_ss *ss);
void ss_cummulate(cst_ss *ss,double a);
void ss_cummulate_n(cst_ss *ss,double a, double count);
#endif