def ffconvert(fname, limit_states, ff, min_iml=1E-10):
"""
Convert a fragility function into a numpy array plus a bunch
of attributes.
:param fname: path to the fragility model file
:param limit_states: expected limit states
:param ff: fragility function node
:returns: a pair (array, dictionary)
"""
with context(fname, ff):
ffs = ff[1:]
imls = ff.imls
nodamage = imls.attrib.get('noDamageLimit')
if nodamage == 0:
# use a cutoff to avoid log(0) in GMPE.to_distribution_values
logging.warn(
'Found a noDamageLimit=0 in %s, line %s, '
'using %g instead', fname, ff.lineno, min_iml)
nodamage = min_iml
with context(fname, imls):
attrs = dict(format=ff['format'], imt=imls['imt'], nodamage=nodamage)
LS = len(limit_states)
if LS != len(ffs):
with context(fname, ff):
raise InvalidFile('expected %d limit states, found %d' %
(LS, len(ffs)))
if ff['format'] == 'continuous':
minIML = float(imls['minIML'])
if minIML == 0:
# use a cutoff to avoid log(0) in GMPE.to_distribution_values
logging.warn('Found minIML=0 in %s, line %s, using %g instead',
fname, imls.lineno, min_iml)
minIML = min_iml
attrs['minIML'] = minIML
attrs['maxIML'] = float(imls['maxIML'])
array = numpy.zeros(LS, [('mean', F64), ('stddev', F64)])
for i, ls, node in zip(range(LS), limit_states, ff[1:]):
if ls != node['ls']:
with context(fname, node):
raise InvalidFile('expected %s, found' % (ls, node['ls']))
array['mean'][i] = node['mean']
array['stddev'][i] = node['stddev']
elif ff['format'] == 'discrete':
attrs['imls'] = ~imls
valid.check_levels(attrs['imls'], attrs['imt'])
num_poes = len(attrs['imls'])
array = numpy.zeros((LS, num_poes))
for i, ls, node in zip(range(LS), limit_states, ff[1:]):
with context(fname, node):
if ls != node['ls']:
raise InvalidFile('expected %s, found' % (ls, node['ls']))
poes = (~node if isinstance(~node, list) else
valid.probabilities(~node))
if len(poes) != num_poes:
raise InvalidFile('expected %s, found' %
(num_poes, len(poes)))
array[i, :] = poes
# NB: the format is constrained in nrml.FragilityNode to be either
# discrete or continuous, there is no third option
return array, attrs
def ffconvert(fname, limit_states, ff, min_iml=1E-10):
"""
Convert a fragility function into a numpy array plus a bunch
of attributes.
:param fname: path to the fragility model file
:param limit_states: expected limit states
:param ff: fragility function node
:returns: a pair (array, dictionary)
"""
with context(fname, ff):
ffs = ff[1:]
imls = ff.imls
nodamage = imls.attrib.get('noDamageLimit')
if nodamage == 0:
# use a cutoff to avoid log(0) in GMPE.to_distribution_values
logging.warning('Found a noDamageLimit=0 in %s, line %s, '
'using %g instead', fname, ff.lineno, min_iml)
nodamage = min_iml
with context(fname, imls):
attrs = dict(format=ff['format'],
imt=imls['imt'],
id=ff['id'],
nodamage=nodamage)
LS = len(limit_states)
if LS != len(ffs):
with context(fname, ff):
raise InvalidFile('expected %d limit states, found %d' %
(LS, len(ffs)))
if ff['format'] == 'continuous':
minIML = float(imls['minIML'])
if minIML == 0:
# use a cutoff to avoid log(0) in GMPE.to_distribution_values
logging.warning('Found minIML=0 in %s, line %s, using %g instead',
fname, imls.lineno, min_iml)
minIML = min_iml
attrs['minIML'] = minIML
attrs['maxIML'] = float(imls['maxIML'])
array = numpy.zeros(LS, [('mean', F64), ('stddev', F64)])
for i, ls, node in zip(range(LS), limit_states, ff[1:]):
if ls != node['ls']:
with context(fname, node):
raise InvalidFile('expected %s, found' %
(ls, node['ls']))
array['mean'][i] = node['mean']
array['stddev'][i] = node['stddev']
elif ff['format'] == 'discrete':
attrs['imls'] = ~imls
valid.check_levels(attrs['imls'], attrs['imt'], min_iml)
num_poes = len(attrs['imls'])
array = numpy.zeros((LS, num_poes))
for i, ls, node in zip(range(LS), limit_states, ff[1:]):
with context(fname, node):
if ls != node['ls']:
raise InvalidFile('expected %s, found' %
(ls, node['ls']))
poes = (~node if isinstance(~node, list)
else valid.probabilities(~node))
if len(poes) != num_poes:
raise InvalidFile('expected %s, found' %
(num_poes, len(poes)))
array[i, :] = poes
# NB: the format is constrained in nrml.FragilityNode to be either
# discrete or continuous, there is no third option
return array, attrs
