modellib/py_src/probe.py

# $Id$

from escript.modelframe import Model,ParameterSet
from escript.escript import Data
from escript.util import *


class EvaluateExpression(ParameterSet):
       """@brief return the evaluation of an expression at current time t and locations in the domain

           WARNING: this class use python's eval function!!!!! Please use input.InterpolateOverBox is possible!!!!

          @param expression (in) - expression or list of expressions defining expression value
          @param out (out) - current value of the expression

        """

       def __init__(self,debug=False):
           """set up parameters"""
           ParameterSet.__init__(self,debug=debug)
           self.declareParameter(domain=None, \
                                 t=0., \
                                 expression="x[0]")

       def out(self):
         x=self.domain.getX()
         t=self.t
         if isinstance(self.expression,str):
           out=eval(self.expression)
         else:
           out=Data(0,(len(self.expression),),x.getFunctionSpace())
           for i in range(len(self.expression)): out[i]=eval(self.expression[i])
         return out

class Probe(Model):
       """@brief tests values against a expression which may depend on time and spatial coordinates
                 it prints out the relative error in each time step and the maximum relative error over
                 all time steps at the end

           WARNING: this class use python's eval function!!!!!

          @param value (in) - values to be tested
          @param expression (in) - expressions defining expression values to test against. If None only value is reported.
          @param line_tag (in) - tag to be used when printing error
          @param t (in) - current time
          @param max_error (out) - maximum error
          @param t_max (out) - time of maximum error

        """

       def __init__(self,debug=False):
           """set up parameters"""
           Model.__init__(self,debug=debug)
           self.declareParameter(expression=None, \
                                 value=0., \
                                 t=0., \
                                 line_tag="PROBE")

       def doInitialization(self):
           """initializes values"""
           self.t_max=None
           self.max_error=0.

       def doStepPostprocessing(self,dt):
            t=self.t
            print "%s : time %e"%(self.line_tag,t)
            v=self.value
            x=v.getFunctionSpace().getX()
            if v.getRank()==0:
              if self.expression==None:
                 print "%s : true (min,max)= (%e,%e)"%(self.line_tag,inf(v),sub(v))
              else:
                ref=eval(self.expression)
                err=Lsup(v-ref)/Lsup(ref)
                print "%s : true (min,max)= (%e,%e)"%(self.line_tag,inf(ref),sup(ref))
                print "%s : (min,max,rel error)= (%e,%e,%e)"%(self.line_tag,inf(v),sup(v),err)
            else:
              err=0
              for i in range(v.getRank()):
                 vi=v[i]
                 if self.expression==None:
                    print "%s :   component %d: true (min,max)= (%e,%e)"%(self.line_tag,i,inf(vi))
                 else:
                    refi=eval(self.expression[i])
                    erri=Lsup(vi-refi)/Lsup(refi)
                    print "%s :   component %d true (min,max)= (%e,%e)"%(self.line_tag,i,inf(refi),sup(refi))
                    print "%s :   component %d (min,max,rel error)= (%e,%e,%e,%e,%e)"%(self.line_tag,i,inf(vi),sup(vi),erri)
                    err=max(err,erri)
              if not self.expression==None: print "%s :   maximum error %e",err
            
            if not self.expression==None: 
               if err>self.max_error:
                   self.t_max=t
                   self.max_error=err

       def doFinalization(self):
          """print out the maximum error"""
          if not self.t_max==None: print "%s : == maximum error %e at time %e == "%(self.line_tag,self.max_error,self.t_max)
1	jgs	144	# $Id$
2
3	jgs	148	from escript.modelframe import Model,ParameterSet
4	jgs	147	from escript.escript import Data
5			from escript.util import *
6	jgs	144
7
8	jgs	148	class EvaluateExpression(ParameterSet):
9	jgs	147	"""@brief return the evaluation of an expression at current time t and locations in the domain
10	jgs	144
11	jgs	147	WARNING: this class use python's eval function!!!!! Please use input.InterpolateOverBox is possible!!!!
12
13			@param expression (in) - expression or list of expressions defining expression value
14			@param out (out) - current value of the expression
15
16			"""
17
18			def __init__(self,debug=False):
19			"""set up parameters"""
20	jgs	148	ParameterSet.__init__(self,debug=debug)
21	jgs	147	self.declareParameter(domain=None, \
22			t=0., \
23			expression="x[0]")
24
25			def out(self):
26			x=self.domain.getX()
27			t=self.t
28			if isinstance(self.expression,str):
29			out=eval(self.expression)
30			else:
31			out=Data(0,(len(self.expression),),x.getFunctionSpace())
32			for i in range(len(self.expression)): out[i]=eval(self.expression[i])
33			return out
34
35	jgs	144	class Probe(Model):
36	jgs	147	"""@brief tests values against a expression which may depend on time and spatial coordinates
37	jgs	144	it prints out the relative error in each time step and the maximum relative error over
38			all time steps at the end
39
40			WARNING: this class use python's eval function!!!!!
41
42			@param value (in) - values to be tested
43	jgs	147	@param expression (in) - expressions defining expression values to test against. If None only value is reported.
44	jgs	144	@param line_tag (in) - tag to be used when printing error
45	jgs	147	@param t (in) - current time
46	jgs	144	@param max_error (out) - maximum error
47			@param t_max (out) - time of maximum error
48
49			"""
50
51			def __init__(self,debug=False):
52			"""set up parameters"""
53			Model.__init__(self,debug=debug)
54	jgs	147	self.declareParameter(expression=None, \
55	jgs	144	value=0., \
56	jgs	147	t=0., \
57	jgs	144	line_tag="PROBE")
58
59	jgs	147	def doInitialization(self):
60	jgs	144	"""initializes values"""
61			self.t_max=None
62	jgs	147	self.max_error=0.
63	jgs	144
64	jgs	147	def doStepPostprocessing(self,dt):
65			t=self.t
66			print "%s : time %e"%(self.line_tag,t)
67	jgs	144	v=self.value
68			x=v.getFunctionSpace().getX()
69			if v.getRank()==0:
70	jgs	147	if self.expression==None:
71			print "%s : true (min,max)= (%e,%e)"%(self.line_tag,inf(v),sub(v))
72	jgs	144	else:
73	jgs	147	ref=eval(self.expression)
74	jgs	144	err=Lsup(v-ref)/Lsup(ref)
75	jgs	147	print "%s : true (min,max)= (%e,%e)"%(self.line_tag,inf(ref),sup(ref))
76			print "%s : (min,max,rel error)= (%e,%e,%e)"%(self.line_tag,inf(v),sup(v),err)
77	jgs	144	else:
78			err=0
79			for i in range(v.getRank()):
80			vi=v[i]
81	jgs	147	if self.expression==None:
82			print "%s : component %d: true (min,max)= (%e,%e)"%(self.line_tag,i,inf(vi))
83	jgs	144	else:
84	jgs	147	refi=eval(self.expression[i])
85	jgs	144	erri=Lsup(vi-refi)/Lsup(refi)
86	jgs	147	print "%s : component %d true (min,max)= (%e,%e)"%(self.line_tag,i,inf(refi),sup(refi))
87			print "%s : component %d (min,max,rel error)= (%e,%e,%e,%e,%e)"%(self.line_tag,i,inf(vi),sup(vi),erri)
88	jgs	144	err=max(err,erri)
89	jgs	147	if not self.expression==None: print "%s : maximum error %e",err
90	jgs	144
91	jgs	147	if not self.expression==None:
92			if err>self.max_error:
93			self.t_max=t
94			self.max_error=err
95	jgs	144
96	jgs	147	def doFinalization(self):
97	jgs	144	"""print out the maximum error"""
98	jgs	147	if not self.t_max==None: print "%s : == maximum error %e at time %e == "%(self.line_tag,self.max_error,self.t_max)
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