def __init__(self, pre, post, target, window=0.0):
"""
*Parameters*:
* **pre**: pre-synaptic population.
* **post**: post-synaptic population.
* **target**: type of the connection.
* **window**: duration of the time window to collect spikes (default: dt).
"""
Projection.__init__(self, pre, post, target, None)
# Check populations
if not self.pre.neuron_type.type == 'spike':
Global._error(
'The pre-synaptic population of a DecodingProjection must be spiking.'
)
exit(0)
if not self.post.neuron_type.type == 'rate':
Global._error(
'The post-synaptic population of a DecodingProjection must be rate-coded.'
)
exit(0)
# Process window argument
if window == 0.0:
window = Global.config['dt']
self.window = window
def __init__(self,
pre,
post,
target,
psp="pre.r * w",
operation="sum",
name=None,
copied=False):
"""
:param pre: pre-synaptic population (either its name or a ``Population`` object).
:param post: post-synaptic population (either its name or a ``Population`` object).
:param target: type of the connection
:param psp: continuous influence of a single synapse on the post-synaptic neuron (default for rate-coded: ``w*pre.r``).
:param operation: operation (sum, max, min, mean) performed by the kernel (default: sum).
"""
# Create the description, but it will not be used for generation
Projection.__init__(self,
pre=pre,
post=post,
target=target,
synapse=SharedSynapse(psp=psp,
operation=operation),
name=name,
copied=copied)
def __init__(self, pre, post, target, psp="w * pre.r", operation="sum"):
"""
Projection based on shared weights: each post-synaptic neuron uses the same weights, so they need to be instantiated only once to save memory.
Learning is not possible for now. The ``synapse`` argument is removed, replaced by a single ``psp`` argument to modified what is summed and ``operation`` to replace the summation operation by max-pooling or similar..
*Parameters*:
* **pre**: pre-synaptic population (either its name or a ``Population`` object).
* **post**: post-synaptic population (either its name or a ``Population`` object).
* **target**: type of the connection.
* **psp**: function to be summed. By default: ``w * pre.r``
* **operation**: function applied on ``psp`` ("sum", "max", "min", "mean"). "sum" is the default.
"""
# Create the description, but it will not be used for generation
Projection.__init__(
self,
pre,
post,
target,
synapse = SharedSynapse(psp=psp, operation=operation)
)
self._omp_config['psp_schedule'] = 'schedule(dynamic)'
if not Global.config["paradigm"] == "openmp":
Global._error('Weight sharing is only implemented for the OpenMP paradigm.')
exit(0)
if not pre.neuron_type.type == 'rate':
Global._error('Weight sharing is only implemented for rate-coded populations.')
exit(0)
def __init__(self, pre, post, target, name=None, copied=False):
"""
:param pre: pre-synaptic population (either its name or a ``Population`` object).
:param post: post-synaptic population (either its name or a ``Population`` object).
:param target: type of the connection.
"""
# Create the description, but it will not be used for generation
Projection.__init__(self, pre, post, target, name=name, copied=copied)
def __init__(self, pre, post, target):
"""
*Parameters*:
* **pre**: pre-synaptic population (either its name or a ``Population`` object).
* **post**: post-synaptic population (either its name or a ``Population`` object).
* **target**: type of the connection.
"""
# Create the description, but it will not be used for generation
Projection.__init__(self, pre, post, target)
def __init__(self,
pre,
post,
target,
operation="max",
name=None,
copied=False):
"""
:param pre: pre-synaptic population (either its name or a ``Population`` object).
:param post: post-synaptic population (either its name or a ``Population`` object).
:param target: type of the connection
:param operation: pooling function to be applied ("max", "min", "mean")
"""
if not operation in ["max", "mean", "min"]:
Global._error(
"Pooling: the operation must be either 'max', 'mean' or 'min'."
)
self.operation = operation
Projection.__init__(
self,
pre,
post,
target,
synapse=SharedSynapse(
psp="pre.r",
operation=operation,
name="Pooling operation",
description=operation +
"-pooling operation over the pre-synaptic population."),
name=name,
copied=copied)
if not pre.neuron_type.type == 'rate':
Global._error(
'Pooling: only implemented for rate-coded populations.')
# check dimensions of populations, should not exceed 4
self.dim_pre = self.pre.dimension
self.dim_post = self.post.dimension
if self.dim_post > 4:
Global._error(
'Pooling: Too many dimensions for the post-synaptic population (maximum 4).'
)
if self.dim_pre > 4:
Global._error(
'Pooling: Too many dimensions for the pre-synaptic population (maximum 4).'
)
# Disable saving
self._saveable = False
def __init__(self, pre, post, target):
"""
*Parameters*:
* **pre**: pre-synaptic population (either its name or a ``Population`` object).
* **post**: post-synaptic population (either its name or a ``Population`` object).
* **target**: type of the connection.
"""
# Create the description, but it will not be used for generation
Projection.__init__(
self,
pre,
post,
target
)
def __init__(self,
pre,
post,
target,
synapse=None,
name=None,
copied=False):
"""
Initialization, receive parameters of Projection objects.
:param pre: pre-synaptic population.
:param post: post-synaptic population.
:param target: type of the connection.
:param window: duration of the time window to collect spikes (default: dt).
"""
Projection.__init__(self,
pre=pre,
post=post,
target=target,
synapse=synapse,
name=name,
copied=copied)
def __init__(self, pre, post, target, window=0.0):
"""
*Parameters*:
* **pre**: pre-synaptic population.
* **post**: post-synaptic population.
* **target**: type of the connection.
* **window**: duration of the time window to collect spikes (default: dt).
"""
Projection.__init__(self, pre, post, target, None)
# Check populations
if not self.pre.neuron_type.type == 'spike':
Global._error('The pre-synaptic population of a DecodingProjection must be spiking.')
exit(0)
if not self.post.neuron_type.type == 'rate':
Global._error('The post-synaptic population of a DecodingProjection must be rate-coded.')
exit(0)
# Process window argument
if window == 0.0:
window = Global.config['dt']
self.window = window
def __init__(self,
pre,
post,
target,
psp="pre.r * w",
operation="sum",
name=None,
copied=False):
"""
:param pre: pre-synaptic population (either its name or a ``Population`` object).
:param post: post-synaptic population (either its name or a ``Population`` object).
:param target: type of the connection
:param psp: continuous influence of a single synapse on the post-synaptic neuron (default for rate-coded: ``w*pre.r``).
:param operation: operation (sum, max, min, mean) performed by the kernel (default: sum).
"""
# Create the description, but it will not be used for generation
Projection.__init__(
self,
pre,
post,
target,
synapse=SharedSynapse(
psp=psp,
operation=operation,
name="Convolution operation",
description=
"Convoluted kernel over the pre-synaptic population."),
name=name,
copied=copied)
# Disable saving
self._saveable = False
# For copy
self._used_single_filter = False
self._used_bank_of_filters = False
self.operation = operation
def __init__(self, proj, target):
"""
:param proj: original projection
:param target: type of the connection (can differ from the original one)
"""
# Transpose is not intended for hybrid projections
if proj.pre.neuron_type.type == "rate" and proj.post.neuron_type.type == "rate":
Projection.__init__(self,
pre=proj.post,
post=proj.pre,
target=target,
synapse=DefaultRateCodedSynapse)
elif proj.pre.neuron_type.type == "spike" and proj.post.neuron_type.type == "spike":
Projection.__init__(self,
pre=proj.post,
post=proj.pre,
target=target,
synapse=DefaultSpikingSynapse)
else:
Global._error(
'TransposeProjection are not applyable on hybrid projections ...'
)
# in the code generation we directly access properties of the
# forward projection. Therefore we store the link here to have access in
# self._generate()
self.fwd_proj = proj
if (proj._connection_delay > 0.0):
Global._error(
'TransposeProjection can not be applied on delayed projections yet ...'
)
# simply copy from the forward view
self.delays = proj._connection_delay
self.max_delay = proj.max_delay
self.uniform_delay = proj.uniform_delay
def __init__(self,
pre,
post,
target,
operation="max",
extent=None,
delays=0.0,
name=None,
copied=False):
"""
:param pre: pre-synaptic population (either its name or a ``Population`` object).
:param post: post-synaptic population (either its name or a ``Population`` object).
:param target: type of the connection
:param operation: pooling function to be applied ("max", "min", "mean")
:param extent: extent of the pooling area expressed in the geometry of the pre-synaptic population. In each
dimension, the product of this extent with the number of neurons in the post-synaptic population
must be equal to the number of pre-synaptic neurons.
:param delays: synaptic delay in ms
"""
self.operation = operation
Projection.__init__(self,
pre,
post,
target,
synapse=SharedSynapse(psp="pre.r",
operation=operation),
name=name,
copied=copied)
if not pre.neuron_type.type == 'rate':
Global._error(
'SharedProjection: Weight sharing is only implemented for rate-coded populations.'
)
# process extent
self.extent_init = extent
if extent is None: # compute the extent automatically
if self.pre.dimension != self.post.dimension:
Global._error(
'PoolingProjection: If you do not provide the extent parameter, the two populations must have the same dimensions.'
)
extent = list(self.pre.geometry)
for dim in range(self.pre.dimension):
extent[dim] /= self.post.geometry[dim]
if self.pre.geometry[
dim] != extent[dim] * self.post.geometry[dim]:
Global._error(
'PoolingProjection: Unable to compute the extent of the pooling area: the number of neurons do not match.'
)
elif not isinstance(extent, tuple):
Global._error(
'SharedProjection: You must provide a tuple for the extent of the pooling operation.'
)
self.extent = list(extent)
if len(self.extent) < self.pre.dimension:
Global._error(
'SharedProjection: You must provide a tuple for the extent of the pooling operation.'
)
# process delays
self.delays = delays
# check dimensions of populations, should not exceed 4
self.dim_pre = self.pre.dimension
self.dim_post = self.post.dimension
if self.dim_post > 4:
Global._error(
'SharedProjection: Too many dimensions for the post-synaptic population (maximum 4).'
)
if self.dim_pre > 4:
Global._error(
'SharedProjection: Too many dimensions for the pre-synaptic population (maximum 4).'
)
# Disable saving
self._saveable = False
# create fake LIL
self._create()
# Generate the pre-synaptic coordinates
self._generate_extent_coordinates()
def __init__(self, pre, post, target, operation="max", extent=None, delays=0.0, name=None, copied=False):
"""
:param pre: pre-synaptic population (either its name or a ``Population`` object).
:param post: post-synaptic population (either its name or a ``Population`` object).
:param target: type of the connection
:param operation: pooling function to be applied ("max", "min", "mean")
:param extent: extent of the pooling area expressed in the geometry of the pre-synaptic population. In each
dimension, the product of this extent with the number of neurons in the post-synaptic population
must be equal to the number of pre-synaptic neurons.
:param delays: synaptic delay in ms
"""
self.operation = operation
Projection.__init__(
self,
pre,
post,
target,
synapse=SharedSynapse(psp="pre.r", operation=operation),
name=name,
copied=copied
)
if not pre.neuron_type.type == 'rate':
Global._error('SharedProjection: Weight sharing is only implemented for rate-coded populations.')
# process extent
self.extent_init = extent
if extent is None: # compute the extent automatically
if self.pre.dimension != self.post.dimension:
Global._error(
'PoolingProjection: If you do not provide the extent parameter, the two populations must have the same dimensions.')
extent = list(self.pre.geometry)
for dim in range(self.pre.dimension):
extent[dim] /= self.post.geometry[dim]
if self.pre.geometry[dim] != extent[dim] * self.post.geometry[dim]:
Global._error(
'PoolingProjection: Unable to compute the extent of the pooling area: the number of neurons do not match.')
elif not isinstance(extent, tuple):
Global._error('SharedProjection: You must provide a tuple for the extent of the pooling operation.')
self.extent = list(extent)
if len(self.extent) < self.pre.dimension:
Global._error('SharedProjection: You must provide a tuple for the extent of the pooling operation.')
# process delays
self.delays = delays
# check dimensions of populations, should not exceed 4
self.dim_pre = self.pre.dimension
self.dim_post = self.post.dimension
if self.dim_post > 4:
Global._error('SharedProjection: Too many dimensions for the post-synaptic population (maximum 4).')
if self.dim_pre > 4:
Global._error('SharedProjection: Too many dimensions for the pre-synaptic population (maximum 4).')
# Disable saving
self._saveable = False
# create fake LIL
self._create()
# Generate the pre-synaptic coordinates
self._generate_extent_coordinates()
