def _get_weight_maximum(self, weights, n_connections, synapse_info):
""" Get the maximum of the weights.
:param weights:
:type weights: ~numpy.ndarray or ~pyNN.random.NumpyRNG or int or float
or list(int) or list(float)
:param int n_connections:
:rtype: float
"""
if isinstance(weights, RandomDistribution):
mean_weight = utility_calls.get_mean(weights)
if mean_weight < 0:
min_weight = utility_calls.get_minimum_probable_value(
weights, n_connections)
low = utility_calls.low(weights)
if low is None:
return abs(min_weight)
return abs(max(min_weight, low))
else:
max_weight = utility_calls.get_maximum_probable_value(
weights, n_connections)
high = utility_calls.high(weights)
if high is None:
return abs(max_weight)
return abs(min(max_weight, high))
elif isinstance(weights, str):
d = self._get_distances(weights, synapse_info)
return numpy.max(_expr_context.eval(weights, d=d))
elif numpy.isscalar(weights):
return abs(weights)
elif hasattr(weights, "__getitem__"):
return numpy.amax(numpy.abs(weights))
raise SpynnakerException("Unrecognised weight format")
def _get_weight_maximum(self, weights, n_connections):
""" Get the maximum of the weights.
"""
if get_simulator().is_a_pynn_random(weights):
mean_weight = utility_calls.get_mean(weights)
if mean_weight < 0:
min_weight = utility_calls.get_minimum_probable_value(
weights, n_connections)
low = utility_calls.low(weights)
if low is None:
return abs(min_weight)
return abs(max(min_weight, low))
else:
max_weight = utility_calls.get_maximum_probable_value(
weights, n_connections)
high = utility_calls.high(weights)
if high is None:
return abs(max_weight)
return abs(min(max_weight, high))
elif numpy.isscalar(weights):
return abs(weights)
elif hasattr(weights, "__getitem__"):
return numpy.amax(numpy.abs(weights))
raise Exception("Unrecognised weight format")
def _get_delay_minimum(self, delays, n_connections, synapse_info):
""" Get the minimum delay given a float, RandomDistribution or list of\
delays.
:param delays: the delays
:type delays: ~numpy.ndarray or ~pyNN.random.NumpyRNG or int or float
or list(int) or list(float)
:param int n_connections: how many connections
"""
if isinstance(delays, RandomDistribution):
low_estimated_delay = utility_calls.get_minimum_probable_value(
delays, n_connections)
low = utility_calls.low(delays)
if low is None:
return low_estimated_delay
# The minimum is the maximum of the possible maximums
return max(low_estimated_delay, low, 1)
elif isinstance(delays, str):
d = self._get_distances(delays, synapse_info)
return numpy.min(_expr_context.eval(delays, d=d))
elif numpy.isscalar(delays):
return delays
elif hasattr(delays, "__getitem__"):
return numpy.min(delays)
raise SpynnakerException("Unrecognised delay format: {:s}".format(
type(delays)))
def _get_weight_maximum(self, weights, n_connections):
""" Get the maximum of the weights.
"""
if get_simulator().is_a_pynn_random(weights):
mean_weight = utility_calls.get_mean(weights)
if mean_weight < 0:
min_weight = utility_calls.get_minimum_probable_value(
weights, n_connections)
low = utility_calls.low(weights)
if low is None:
return abs(min_weight)
return abs(max(min_weight, low))
else:
max_weight = utility_calls.get_maximum_probable_value(
weights, n_connections)
high = utility_calls.high(weights)
if high is None:
return abs(max_weight)
return abs(min(max_weight, high))
elif numpy.isscalar(weights):
return abs(weights)
elif hasattr(weights, "__getitem__"):
return numpy.amax(numpy.abs(weights))
raise Exception("Unrecognised weight format")
