Changed field names to make them unique.

cluster.cc

@@ -326,11 +326,11 @@ void print_results(const vector<int>& idx,
   string tablehead;
   tablehead = "Cluster Index\tVoxels";
   if (!pthresh.unset()) tablehead += "\tP\t-log10(P)";
-  tablehead += "\tMax Z\tx" + units + "\ty" + units + "\tz" + units
-    + "\tCOG x" + units + "\tCOG y" + units + "\tCOG z" + units;
+  tablehead += "\tZ-MAX\tZ-MAX X" + units + "\tZ-MAX Y" + units + "\tZ-MAX Z" + units
+    + "\tZ-COG X" + units + "\tZ-COG Y" + units + "\tZ-COG Z" + units;
   if (!copename.unset()) {
-    tablehead+= "\tMax COPE\tx" + units + "\ty" + units + "\tz" + units 
-                 + "\tMean COPE";
+    tablehead+= "\tCOPE-MAX\tCOPE-MAX X" + units + "\tCOPE-MAX Y" + units + "\tCOPE-MAX Z" + units 
+                 + "\tCOPE-MEAN";
   }
 
   cout << tablehead << endl;