r13707 - in /branches/gui_testing: ./ generic_fns/pcs.py -- July 18, 2011 - 20:28

Author: bugman
Date: Mon Jul 18 20:28:09 2011
New Revision: 13707

URL: http://svn.gna.org/viewcvs/relax?rev=13707&view=rev
Log:
Merged revisions 13706 via svnmerge from 
svn+ssh://bugman@xxxxxxxxxxx/svn/relax/1.3

........
  r13706 | bugman | 2011-07-18 20:13:04 +0200 (Mon, 18 Jul 2011) | 6 lines
  
  Fix for the PCS back-calculation function - divide by zero is now avoided.
  
  The PCS back-calculation function was calculating the normalised bond 
vector between the lanthanide
  atom and itself.  The normalisation in this case is now avoided.
........

Modified:
    branches/gui_testing/   (props changed)
    branches/gui_testing/generic_fns/pcs.py

Propchange: branches/gui_testing/
------------------------------------------------------------------------------
--- svnmerge-integrated (original)
+++ svnmerge-integrated Mon Jul 18 20:28:09 2011
@@ -1,1 +1,1 @@
-/1.3:1-13688
+/1.3:1-13706

Modified: branches/gui_testing/generic_fns/pcs.py
URL: 
http://svn.gna.org/viewcvs/relax/branches/gui_testing/generic_fns/pcs.py?rev=13707&r1=13706&r2=13707&view=diff
==============================================================================
--- branches/gui_testing/generic_fns/pcs.py (original)
+++ branches/gui_testing/generic_fns/pcs.py Mon Jul 18 20:28:09 2011
@@ -98,8 +98,9 @@
                 # The length.
                 r[c] = norm(vect[c])
 
-                # Normalise.
-                vect[c] = vect[c] / r[c]
+                # Normalise (only if the vector has length).
+                if r[c]:
+                    vect[c] = vect[c] / r[c]
 
                 # Calculate the PCS constant.
                 dj[c] = pcs_constant(cdp.temperature[id], cdp.frq[id] * 2.0 
* pi / g1H, r[c]/1e10)