--- imach/src/imach.c	2002/11/20 07:56:21	1.62
+++ imach/src/imach.c	2002/11/20 17:35:59	1.63
@@ -1,4 +1,4 @@
-/* $Id: imach.c,v 1.62 2002/11/20 07:56:21 brouard Exp $
+/* $Id: imach.c,v 1.63 2002/11/20 17:35:59 lievre Exp $
    Interpolated Markov Chain
 
   Short summary of the programme:
@@ -969,7 +969,11 @@ double func( double *x)
 	s1=s[mw[mi][i]][i];
 	s2=s[mw[mi+1][i]][i];
 	bbh=(double)bh[mi][i]/(double)stepm;
-	lli= (savm[s1][s2]>(double)1.e-8 ?(1.+bbh)*log(out[s1][s2])- bbh*log(savm[s1][s2]):log((1.+bbh)*out[s1][s2]));
+
+	/*	lli= (savm[s1][s2]>(double)1.e-8 ?(1.+bbh)*log(out[s1][s2])- bbh*log(savm[s1][s2]):log((1.+bbh)*out[s1][s2]));*/
+
+	lli= (savm[s1][s2]>(double)1.e-8 ?log((1.+bbh)*out[s1][s2]- bbh*(savm[s1][s2])):log((1.+bbh)*out[s1][s2])); /* linear interpolation */
+
 	/*lli= (savm[s1][s2]>1.e-8 ?(1.+bbh)*log(out[s1][s2])- bbh*log(savm[s1][s2]):log((1.-bbh)*out[s1][s2]));*/
 	/*lli=(1.+bbh)*log(out[s1][s2])- bbh*log(savm[s1][s2]);*/
 	/*if(lli ==000.0)*/