From 7d84fe61a5b7f84dcfb6adf3f1f17841a60677fd Mon Sep 17 00:00:00 2001
From: sjplimp <sjplimp@f3b2605a-c512-4ea7-a41b-209d697bcdaa>
Date: Fri, 16 Jul 2010 14:39:20 +0000
Subject: [PATCH] git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@4386
 f3b2605a-c512-4ea7-a41b-209d697bcdaa

---
 src/variable.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/variable.cpp b/src/variable.cpp
index ddbbdf6e47..285490805f 100644
--- a/src/variable.cpp
+++ b/src/variable.cpp
@@ -1781,6 +1781,7 @@ int Variable::group_function(char *word, char *contents, Tree **tree,
     } else error->all("Invalid group function in variable formula");
     if (strcmp(arg2,"xx") == 0) value = inertia[0][0];
     else if (strcmp(arg2,"yy") == 0) value = inertia[1][1];
+    else if (strcmp(arg2,"zz") == 0) value = inertia[2][2];
     else if (strcmp(arg2,"xy") == 0) value = inertia[0][1];
     else if (strcmp(arg2,"yz") == 0) value = inertia[1][2];
     else if (strcmp(arg2,"xz") == 0) value = inertia[0][2];