On Fri, Sep 30, 2016, 杨培 wrote: > Thanks。 > As your answer。 The problem is I ignore the update dictionary returned by > theano scan。 > Here，I have a new question。 > In my program，this code is in another scan loop， and I have used the update > dictionary for the outter scan loop。 > So，how I can past the update dictionary of RandomStream to theano function > method。
In the step function of the outer loop, return the updates dictionary coming from the inner scan. Then, pass the updates dictionary coming from the outer scan to theano.function. > > 2016-09-30 5:57 GMT+08:00 Pascal Lamblin <[email protected]>: > > > Also, never ignore the updates returned by theano.scan! > > In other words, always do: > > > > result, updates = theano.scan(...) > > f = theano.function(..., updates=updates) > > > > and never: > > > > result, _ = theano.scan(...) > > > > On Thu, Sep 29, 2016, 杨培 wrote: > > > When I use theano loop with RandomStream to generate random number， > > > theano compile fail with “MissingInput”。 > > > > > > I Google this problem， and I found ： > > > > > > - a issue（https://github.com/Theano/Theano/issues/3437）。This issue > > said > > > we cannot use RandomStream with symbolic shape in scan。 > > > > > > But I also found ： > > > > > > - a documentation int Theano > > > （http://deeplearning.net/software/theano/library/scan. > > html#using-shared-variables-gibbs-sampling），the > > > code in the documentation use RandomStream with symbolic shape in > > scan。 > > > > > > So，how to use theano scan with RandomStream。Thanks for your help > > > > > > here is my code。this code compile failed > > > > > > > > > - import theano; > > > - from theano import tensor as T; > > > - import numpy as np; > > > - > > > - from theano.sandbox.rng_mrg import MRG_RandomStreams as > > RandomStreams; > > > - > > > - x=T.ivector(); > > > - > > > - def step(i): > > > - sample=RandomStreams().binomial(size=(i,)); > > > - return sample; > > > - > > > - result,_=theano.scan(fn=step,outputs_info=None, > > > - sequences=[x]); > > > - > > > - f=theano.function([x],result); > > > - > > > - x_val=np.array([1,2,3],dtype='int32'); > > > - print f(x_val); > > > > > > > > > this code work fine > > > > > > - import theano; > > > - from theano import tensor as T; > > > - import numpy as np; > > > - > > > - from theano.sandbox.rng_mrg import MRG_RandomStreams as > > RandomStreams; > > > - > > > - x=T.ivector(); > > > - len=x.shape[0]; > > > - > > > - def step(i): > > > - len_=len; > > > - sample=RandomStreams().binomial(size=(len_,)); > > > - return sample; > > > - > > > - result,_=theano.scan(fn=step,outputs_info=None, > > > - sequences=[x]); > > > - > > > - f=theano.function([x],result); > > > - > > > > > > > > > - x_val=np.array([1,2,3],dtype='int32'); > > > - print f(x_val); > > > > > > > > > > > > > > > > > > -- > > > > > > --- > > > You received this message because you are subscribed to the Google > > Groups "theano-users" group. > > > To unsubscribe from this group and stop receiving emails from it, send > > an email to [email protected]. > > > For more options, visit https://groups.google.com/d/optout. > > > > > > -- > > Pascal > > > > -- > > > > --- > > You received this message because you are subscribed to a topic in the > > Google Groups "theano-users" group. > > To unsubscribe from this topic, visit https://groups.google.com/d/ > > topic/theano-users/InLNaYdIxak/unsubscribe. > > To unsubscribe from this group and all its topics, send an email to > > [email protected]. > > For more options, visit https://groups.google.com/d/optout. > > > > -- > > --- > You received this message because you are subscribed to the Google Groups > "theano-users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. -- Pascal -- --- You received this message because you are subscribed to the Google Groups "theano-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
