+++ /dev/null
-
-/* copyright (c) 1996, 1997, 1998, 1999 William R. Pearson and the
- U. of Virginia */
-
-/* $Name: fa_34_26_5 $ - $Id: sc_to_e.c,v 1.2 2006/04/12 18:00:02 wrp Exp $ */
-
-/* sc_to_e uses statistical parameters from search and
- score, length, and database size to calculate E()
-*/
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
-
-double mean_var, mu, rho;
-
-main(argc, argv)
- int argc; char **argv;
-{
- char line[128];
- int score, length, db_size;
- double z_val, s_to_zv(), zv_to_E();
-
- if (argc == 4) {
- sscanf(argv[1],"%lf",&rho);
- sscanf(argv[2],"%lf",&mu);
- sscanf(argv[3],"%lf",&mean_var);
- }
- else {
- fprintf(stderr," enter rho mu mean_var: ");
- fgets(line,sizeof(line),stdin);
- sscanf(line,"%lf %lf %lf",&rho, &mu, &mean_var);
- }
-
- while (1) {
- fprintf(stderr," enter score length db_size: ");
- if (fgets(line,sizeof(line),stdin)==NULL) exit(0);
- if (line[0]=='\n') exit(0);
- sscanf(line,"%d %d %d",&score, &length, &db_size);
- if (db_size < 1) db_size = 50000;
-
- z_val = s_to_zv(score, length);
-
- printf(" s: %d (%d) E(%d): %4.2g\n",score,length,db_size,zv_to_E(z_val,db_size));
- }
-}
-
-double s_to_zv(int score, int length)
-{
- return ((double)score - rho * log((double)length) - mu)/sqrt(mean_var);
-}
-
-double zv_to_E(double zv, int db_size)
-{
- double e;
-
- e = exp(-1.282554983 * zv - .577216);
- return (double)db_size * (e > .01 ? 1.0 - exp(-e) : e);
-}