enhanced 'Mean' attribute on vcs plots

fix #1024
use %.4g rather %.f for both prettyness and 'last-digits-may-change-on-some-machnies' reasons
use cdutil where possible to produce a better average

Packages/vcs/Lib/template.py

@@ -34,6 +34,7 @@
 from Pdata import *
 from types import *
 import inspect
+import cdutil
 
 ## Following for class properties
 def _getgen(self,name):
@@ -1239,9 +1240,16 @@ def plot(self,x,slab,gm,bg=0,min=None,max=None,X=None,Y=None,**kargs):
  tt.string='Max %g' % smx
  elif s=='mean':
  if not inspect.ismethod(getattr(slab,'mean')):
- tt.string='Mean '+str(getattr(slab,s))
+ meanstring='Mean '+str(getattr(slab,s))
  else:
- tt.string='Mean %f'%slab.mean()
+ try:
+ #slices = [slice(0,1),] * (slab.ndim -2 )
+ meanstring='Mean %.4g'% float(cdutil.averager(slab,
+ axis = " ".join(["(%s)" % S for S in slab.getAxisIds()])))
+ except Exception,err:
+ meanstring='Mean %.4g'%slab.mean()
+ tt.string=meanstring
+ print tt.list()
  else :
  tt.string=str(getattr(slab,s))
  tt.x=[sub.x]