+++ /dev/null
-/* this procedure implements Altschul's pre-calculated values for lambda, K */
-
-/* $Name: fa_34_26_5 $ - $Id: ag_stats.c,v 1.5 2006/04/12 18:00:01 wrp Exp $ */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
-
-#include "alt_parms.h"
-
-static double K, Lambda, H;
-
-int
-ag_parm(char *pam_type, int gdelval, int ggapval)
-{
- int r_v, t_gdelval, t_ggapval;
-
-#ifdef OLD_FASTA_GAP
- t_gdelval = gdelval;
- t_ggapval = ggapval;
-#else
- t_gdelval = gdelval+ggapval;
- t_ggapval = ggapval;
-#endif
-
- if (strcmp(pam_type,"BL50")==0 || strcmp(pam_type,"BLOSUM50")==0)
- r_v = look_p(bl50_p,t_gdelval,t_ggapval,&K,&Lambda,&H);
- else if (strcmp(pam_type,"BL62")==0 || strcmp(pam_type,"BLOSUM62")==0)
- r_v = look_p(bl62_p,t_gdelval,t_ggapval,&K,&Lambda,&H);
- else if (strcmp(pam_type,"P250")==0)
- r_v = look_p(p250_p,t_gdelval,t_ggapval,&K,&Lambda,&H);
- else if (strcmp(pam_type,"P120")==0)
- r_v = look_p(p120_p,t_gdelval,t_ggapval,&K,&Lambda,&H);
- else if (strcmp(pam_type,"MD_10")==0)
- r_v = look_p(md10_p,t_gdelval,t_ggapval,&K,&Lambda,&H);
- else if (strcmp(pam_type,"MD_20")==0)
- r_v = look_p(md20_p,t_gdelval,t_ggapval,&K,&Lambda,&H);
- else if (strcmp(pam_type,"MD_40")==0)
- r_v = look_p(md40_p,t_gdelval,t_ggapval,&K,&Lambda,&H);
- else if (strcmp(pam_type,"DNA")==0 || strcmp(pam_type,"+5/-4")==0)
- r_v = look_p(nt54_p,t_gdelval,t_ggapval,&K,&Lambda,&H);
- else r_v = 0;
-
- return r_v;
-}
-
-int
-look_p(struct alt_p parm[], int gap, int ext,
- double *K, double *Lambda, double *H)
-{
- int i;
-
- gap = -gap;
- ext = -ext;
-
- if (gap > parm[1].gap) {
- *K = parm[0].K;
- *Lambda = parm[0].Lambda;
- *H = parm[0].H;
- return 1;
- }
-
- for (i=1; parm[i].gap > 0; i++) {
- if (parm[i].gap > gap) continue;
- else if (parm[i].gap == gap && parm[i].ext > ext ) continue;
- else if (parm[i].gap == gap && parm[i].ext == ext) {
- *K = parm[i].K;
- *Lambda = parm[i].Lambda;
- *H = parm[i].H;
- return 1;
- }
- else break;
- }
- return 0;
-}
-
-int E1_to_s(double e_val, int n0, int n1) {
- double mp, np, a_n0, a_n0f, a_n1, a_n1f, u;
- int score;
-
- a_n0 = (double)n0;
- a_n0f = log(a_n0)/H;
-
- a_n1 = (double)n1;
- a_n1f = log(a_n1)/H;
-
- mp = a_n0 - a_n0f - a_n1f;
- np = a_n1 - a_n0f - a_n1f;
-
- if (np < 1.0) np = 1.0;
- if (mp < 1.0) mp = 1.0;
-
- /*
- e_val = K * np * mp * exp ( - Lambda * score);
- log(e_val) = log(K np mp) - Lambda * score;
- (log(K np mp)-log(e_val)) / Lambda = score;
- */
- score = (int)((log( K * mp * np) - log(e_val))/Lambda +0.5);
- if (score < 0) score = 0;
- return score;
-}
-
-double s_to_E4(int score, int n0, int n1)
-{
- double p_val;
- double mp, np, a_n0, a_n0f, a_n1, a_n1f, u;
-
- a_n0 = (double)n0;
- a_n0f = log(a_n0)/H;
-
- a_n1 = (double)n1;
- a_n1f = log(a_n1)/H;
-
- mp = a_n0 - a_n0f - a_n1f;
- np = a_n1 - a_n0f - a_n1f;
-
- if (np < 1.0) np = 1.0;
- if (mp < 1.0) mp = 1.0;
-
- p_val = K * np * mp * exp ( - Lambda * score);
-
- if (p_val > 0.01) p_val = 1.0 - exp(-p_val);
-
- return p_val * 10000.0;
-}
-