update the criterion for the fit convergence

1 files changed, 6 insertions, 2 deletions

diff --git a/src/fit.c b/src/fit.c
index 8b17062..66f9a12 100644
--- a/src/fit.c
+++ b/src/fit.c
@@ -127,10 +127,14 @@ int fit_event(event *ev, double *xopt, double *fmin)
 
     do {
         *fmin = fval;
+        memcpy(xopt,x,sizeof(x));
         rv = nlopt_optimize(opt,x,&fval);
-    } while (fabs(fval-*fmin) > 1e-5);
+    } while (fval < *fmin && fabs(fval-*fmin) > 1e-5);
 
-    memcpy(xopt,x,sizeof(x));
+    if (fval < *fmin) {
+        *fmin = fval;
+        memcpy(xopt,x,sizeof(x));
+    }
 
     nlopt_destroy(opt);