| 1 |
|
| 2 |
############################################################################## |
| 3 |
# |
| 4 |
# Copyright (c) 2003-2020 by The University of Queensland |
| 5 |
# http://www.uq.edu.au |
| 6 |
# |
| 7 |
# Primary Business: Queensland, Australia |
| 8 |
# Licensed under the Apache License, version 2.0 |
| 9 |
# http://www.apache.org/licenses/LICENSE-2.0 |
| 10 |
# |
| 11 |
# Development until 2012 by Earth Systems Science Computational Center (ESSCC) |
| 12 |
# Development 2012-2013 by School of Earth Sciences |
| 13 |
# Development from 2014 by Centre for Geoscience Computing (GeoComp) |
| 14 |
# Development from 2019 by School of Earth and Environmental Sciences |
| 15 |
# |
| 16 |
############################################################################## |
| 17 |
|
| 18 |
from __future__ import print_function, division |
| 19 |
|
| 20 |
__copyright__="""Copyright (c) 2003-2020 by The University of Queensland |
| 21 |
http://www.uq.edu.au |
| 22 |
Primary Business: Queensland, Australia""" |
| 23 |
__license__="""Licensed under the Apache License, version 2.0 |
| 24 |
http://www.apache.org/licenses/LICENSE-2.0""" |
| 25 |
__url__="https://launchpad.net/escript-finley" |
| 26 |
|
| 27 |
from esys.escript.modelframe import Model,ParameterSet |
| 28 |
from esys.escript import Data |
| 29 |
from esys.escript.util import * |
| 30 |
|
| 31 |
|
| 32 |
class EvaluateExpression(ParameterSet): |
| 33 |
""" |
| 34 |
Return the evaluation of an expression at current time t and |
| 35 |
locations in the domain |
| 36 |
|
| 37 |
:warning: this class use python's eval function!!!!! |
| 38 |
Please use input.InterpolateOverBox is possible!!!! |
| 39 |
:note: Instance variable expression - expression or list of expressions defining |
| 40 |
expression value (in) |
| 41 |
:note: Instance variable out - current value of the expression (callable) |
| 42 |
""" |
| 43 |
|
| 44 |
def __init__(self,**kwargs): |
| 45 |
""" |
| 46 |
Set up parameters |
| 47 |
""" |
| 48 |
super(EvaluateExpression, self).__init__(**kwargs) |
| 49 |
self.declareParameter(domain=None, \ |
| 50 |
t=0., \ |
| 51 |
expression="x[0]") |
| 52 |
|
| 53 |
def out(self): |
| 54 |
x=self.domain.getX() |
| 55 |
t=self.t |
| 56 |
if isinstance(self.expression,str): |
| 57 |
out=eval(self.expression) |
| 58 |
else: |
| 59 |
out=Data(0,(len(self.expression),),x.getFunctionSpace()) |
| 60 |
for i in range(len(self.expression)): out[i]=eval(self.expression[i]) |
| 61 |
return out |
| 62 |
|
| 63 |
class Probe(Model): |
| 64 |
""" |
| 65 |
Tests values against a expression which may depend on time and spatial |
| 66 |
coordinates. |
| 67 |
|
| 68 |
It prints out the relative error in each time step and the maximum |
| 69 |
relative error over all time steps at the end. |
| 70 |
|
| 71 |
:warning: this class uses python's eval function!!!!! |
| 72 |
:ivar value: values to be tested (in) |
| 73 |
:ivar expression: expressions defining expression values to test against. If None only value is reported. (in) |
| 74 |
:ivar line_tag: tag to be used when printing error. (in) |
| 75 |
:ivar t: current time (in) |
| 76 |
:ivar max_error: maximum error (out) |
| 77 |
:ivar t_max: time of maximum error (out) |
| 78 |
|
| 79 |
""" |
| 80 |
|
| 81 |
def __init__(self,**kwargs): |
| 82 |
""" |
| 83 |
Set up parameters |
| 84 |
""" |
| 85 |
super(Probe, self).__init__(**kwargs) |
| 86 |
self.declareParameter(expression=None, \ |
| 87 |
value=0., \ |
| 88 |
t=0., \ |
| 89 |
line_tag="PROBE") |
| 90 |
|
| 91 |
def doInitialization(self): |
| 92 |
""" |
| 93 |
Initializes values |
| 94 |
""" |
| 95 |
self.t_max=None |
| 96 |
self.max_error=0. |
| 97 |
|
| 98 |
def doStepPostprocessing(self,dt): |
| 99 |
t=self.t |
| 100 |
print("%s : time %e"%(self.line_tag,t)) |
| 101 |
v=self.value |
| 102 |
x=v.getFunctionSpace().getX() |
| 103 |
if v.getRank()==0: |
| 104 |
if self.expression==None: |
| 105 |
print("%s : true (min,max)= (%e,%e)"%(self.line_tag,inf(v),sub(v))) |
| 106 |
else: |
| 107 |
ref=eval(self.expression) |
| 108 |
err=Lsup(v-ref)/Lsup(ref) |
| 109 |
print("%s : true (min,max)= (%e,%e)"%(self.line_tag,inf(ref),sup(ref))) |
| 110 |
print("%s : (min,max,rel error)= (%e,%e,%e)"%(self.line_tag,inf(v),sup(v),err)) |
| 111 |
else: |
| 112 |
err=0 |
| 113 |
for i in range(v.getRank()): |
| 114 |
vi=v[i] |
| 115 |
if self.expression==None: |
| 116 |
print("%s : component %d: true (min,max)= (%e,%e)"%(self.line_tag,i,inf(vi))) |
| 117 |
else: |
| 118 |
refi=eval(self.expression[i]) |
| 119 |
erri=Lsup(vi-refi)/Lsup(refi) |
| 120 |
print("%s : component %d true (min,max)= (%e,%e)"%(self.line_tag,i,inf(refi),sup(refi))) |
| 121 |
print("%s : component %d (min,max,rel error)= (%e,%e,%e,%e,%e)"%(self.line_tag,i,inf(vi),sup(vi),erri)) |
| 122 |
err=max(err,erri) |
| 123 |
if not self.expression==None: print("%s : maximum error %e",err) |
| 124 |
|
| 125 |
if not self.expression==None: |
| 126 |
if err>self.max_error: |
| 127 |
self.t_max=t |
| 128 |
self.max_error=err |
| 129 |
|
| 130 |
def doFinalization(self): |
| 131 |
""" |
| 132 |
Print out the maximum error. |
| 133 |
""" |
| 134 |
if not self.t_max==None: print("%s : == maximum error %e at time %e == "%(self.line_tag,self.max_error,self.t_max)) |
| 135 |
|
| 136 |
# vim: expandtab shiftwidth=4: |
Parent Directory
| 
Revision Log