Index: trunk/Ohana/src/opihi/cmd.data/peak.c
===================================================================
--- trunk/Ohana/src/opihi/cmd.data/peak.c	(revision 2598)
+++ trunk/Ohana/src/opihi/cmd.data/peak.c	(revision 4689)
@@ -23,5 +23,7 @@
 
   imax = -1;
-  for (i = 0; i < vecx[0].Nelements-1; i++, X++, Y++) {
+  xmax = *X;
+  ymax = *Y;
+  for (i = 1; i < vecx[0].Nelements-1; i++, X++, Y++) {
     if ((*X >= start) && (*X <= end)) {
       if ((imax == -1) || (*Y > ymax)) {