1 /*************************************************************************/ 2 /* */ 3 /* Language Technologies Institute */ 4 /* Carnegie Mellon University */ 5 /* Copyright (c) 2001 */ 6 /* All Rights Reserved. */ 7 /* */ 8 /* Permission is hereby granted, free of charge, to use and distribute */ 9 /* this software and its documentation without restriction, including */ 10 /* without limitation the rights to use, copy, modify, merge, publish, */ 11 /* distribute, sublicense, and/or sell copies of this work, and to */ 12 /* permit persons to whom this work is furnished to do so, subject to */ 13 /* the following conditions: */ 14 /* 1. The code must retain the above copyright notice, this list of */ 15 /* conditions and the following disclaimer. */ 16 /* 2. Any modifications must be clearly marked as such. */ 17 /* 3. Original authors' names are not deleted. */ 18 /* 4. The authors' names are not used to endorse or promote products */ 19 /* derived from this software without specific prior written */ 20 /* permission. */ 21 /* */ 22 /* CARNEGIE MELLON UNIVERSITY AND THE CONTRIBUTORS TO THIS WORK */ 23 /* DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING */ 24 /* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT */ 25 /* SHALL CARNEGIE MELLON UNIVERSITY NOR THE CONTRIBUTORS BE LIABLE */ 26 /* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES */ 27 /* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN */ 28 /* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, */ 29 /* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF */ 30 /* THIS SOFTWARE. */ 31 /* */ 32 /*************************************************************************/ 33 /* Author: Alan W Black (awb@cs.cmu.edu) */ 34 /* Date: November 2001 */ 35 /*************************************************************************/ 36 /* */ 37 /* sufficient statitsics */ 38 /* */ 39 /*************************************************************************/ 40 #ifndef _CST_SS_H__ 41 #define _CST_SS_H__ 42 43 typedef struct cst_ss_struct { 44 double num_samples; 45 double sum; 46 double sumx; 47 } cst_ss; 48 49 cst_ss *new_ss(); 50 void delete_ss(cst_ss *ss); 51 void ss_reset(cst_ss *ss); 52 double ss_mean(cst_ss *ss); 53 double ss_variance(cst_ss *ss); 54 double ss_stddev(cst_ss *ss); 55 void ss_cummulate(cst_ss *ss,double a); 56 void ss_cummulate_n(cst_ss *ss,double a, double count); 57 58 #endif 59