all:
I want to iterate rows of matrix,and compute based on current row
,previous output( with taps =[-2,-1]).when running,the output is right but
some errors also raise:
ERROR (theano.gof.opt): SeqOptimizer apply
<theano.gof.opt.EquilibriumOptimizer object at 0x7f67b8fbb350>
ERROR (theano.gof.opt): Traceback:
ERROR (theano.gof.opt): Traceback (most recent call last):
File
"/usr/local/lib/python2.7/dist-packages/Theano-0.8.2-py2.7.egg/theano/gof/opt.py",
line 230, in apply
sub_prof = optimizer.optimize(fgraph)
File
"/usr/local/lib/python2.7/dist-packages/Theano-0.8.2-py2.7.egg/theano/gof/opt.py",
line 89, in optimize
ret = self.apply(fgraph, *args, **kwargs)
File
"/usr/local/lib/python2.7/dist-packages/Theano-0.8.2-py2.7.egg/theano/gof/opt.py",
line 2144, in apply
sub_prof = gopt.apply(fgraph)
File
"/usr/local/lib/python2.7/dist-packages/Theano-0.8.2-py2.7.egg/theano/scan_module/scan_opt.py",
line 1631, in apply
self.process_node(fgraph, node)
File
"/usr/local/lib/python2.7/dist-packages/Theano-0.8.2-py2.7.egg/theano/scan_module/scan_opt.py",
line 1446, in process_node
nw_input = scan_utils.expand_empty(_nw_input, tmp)
File
"/usr/local/lib/python2.7/dist-packages/Theano-0.8.2-py2.7.egg/theano/scan_module/scan_utils.py",
line 620, in expand_empty
new_shape = [size + shapes[0]] + shapes[1:]
IndexError: list index out of range
there is the code :
import theano
import theano.tensor as T
import numpy as np
X=T.fmatrix()
x=np.arange(12).reshape(6,2)
result_lag_two_other,updates=theano.scan(lambda x,x2,x1:x+x2+x1, #
@UnusedVariable
sequences=X,
outputs_info=dict(initial=T.zeros((2,X.shape[1])),taps=[-2,-1]),
truncate_gradient=-1
)
func_lag_two_other=theano.function([X],result_lag_two_other,allow_input_downcast=True,on_unused_input=u'ignore')
t_lag_two_other=func_lag_two_other(x)
print t_lag_two_other
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