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comparison pylearn/sampling/hmc.py @ 1447:fbe470217937

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Use .get_value() and .set_value() of shared instead of the .value property
author Pascal Lamblin <lamblinp@iro.umontreal.ca>
date Wed, 16 Mar 2011 20:20:02 -0400
parents 746ebceeb46f
children 55534951dd91
comparison
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1446:6e50d209b5f1 1447:fbe470217937
235 respect to the positions for HMC sampling to work. 235 respect to the positions for HMC sampling to work.
236 """ 236 """
237 # allocate shared vars 237 # allocate shared vars
238 238
239 if shared_positions_shape==None: 239 if shared_positions_shape==None:
240 shared_positions_shape = shared_positions.value.shape 240 shared_positions_shape = shared_positions.get_value(borrow=True).shape
241 batchsize = shared_positions_shape[0] 241 batchsize = shared_positions_shape[0]
242 242
243 stepsize = shared(numpy.asarray(initial_stepsize).astype(theano.config.floatX), 'hmc_stepsize') 243 stepsize = shared(numpy.asarray(initial_stepsize).astype(theano.config.floatX), 'hmc_stepsize')
244 avg_acceptance_rate = shared(target_acceptance_rate, 'avg_acceptance_rate') 244 avg_acceptance_rate = shared(target_acceptance_rate, 'avg_acceptance_rate')
245 s_rng = TT.shared_randomstreams.RandomStreams(seed) 245 s_rng = TT.shared_randomstreams.RandomStreams(seed)
287 The `kwargs` dictionary is passed to the shared variable (self.positions) `get_value()` 287 The `kwargs` dictionary is passed to the shared variable (self.positions) `get_value()`
288 function. So for example, to avoid copying the shared variable value, consider passing 288 function. So for example, to avoid copying the shared variable value, consider passing
289 `borrow=True`. 289 `borrow=True`.
290 """ 290 """
291 self.simulate() 291 self.simulate()
292 return self.positions.value.copy() 292 return self.positions.get_value(borrow=False)
293 293
294 def updates(self): 294 def updates(self):
295 """Returns the update expressions required to simulate the Markov Chain 295 """Returns the update expressions required to simulate the Markov Chain
296 296
297 :TODO: :WRITEME: *prescriptive* definition of what this method does (API) 297 :TODO: :WRITEME: *prescriptive* definition of what this method does (API)