Here is a printout of the error message:
MissingInputError: ('An input of the graph, used to compute
TheanoInterpWrapOp.theanointerp(y), was not provided and not given a
value', y)
What this says is that some nodes in your graph
(TheanoInterpWrapOp.theanointerp(y),) weren't given access to all of the
inputs that they needed. This would happen in Theano if, for example,
x = theano.tensor.vector('x')
y = theano.tensor.vector('y')
z = x + y
f = theano.function([x], [z])
Notice that we're only giving function x and asking it to compute z. This
code will produce a similar error to what you're receiving.
On Thu, Aug 22, 2013 at 4:58 PM, Guy Parsey <[email protected]> wrote:
> Correction (independent of testing the theano op), 's' is a simple wrapper
> to the spline function, it is not the sympy wrapper. the sympy wrapper is K
> and can be evaluated as
> In [17]: K._imp_(4.0)
> Out[17]: array(16.0)
>
> On Thursday, August 22, 2013 5:44:35 PM UTC-4, Guy Parsey wrote:
>>
>> Hey Matt,
>> I am pretty sure that I have tested the theano Op separately from Sympy,
>> but again, I am probably missing something silly.
>> After running the test cases, or evaluating
>> k = TestInterpOp()
>> k.CreateSuite()
>> from the SymPy_Theano_KGM_indep.py file, one can run the following lines
>>
>> In [2]: s,K,Kp = k.SymInterp()
>>
>> In [3]: op = k.TheanoInterpOp()
>>
>> In [4]: x = theano.tensor.dvector()
>>
>> In [5]: f = theano.function([x],op(x))
>>
>> In [6]: s(4.0)
>> Out[6]: array(16.0)
>>
>> In [7]: f([4.0])
>> Out[7]: array([ 16.])
>>
>> where 's' is the sympy wrapped spline function (undefined function) and
>> 'f' is the theano.function of the theano op created around the spline.
>> Is this what you mean?
>> Cheers,
>> Guy
>>
>> On Thursday, August 22, 2013 5:18:49 PM UTC-4, Matthew wrote:
>>>
>>> Have you tested your interpolation op in isolation from SymPy?
>>>
>>> A quick glance at the error (quick glance means I can easily be wrong)
>>> leads me to think that this particular issue is localized within the domain
>>> of Theano. If this is the case then I recommend asking about your spline
>>> op on the [email protected] mailing list.
>>>
>>>
>>> On Thu, Aug 22, 2013 at 3:59 PM, Guy Parsey <[email protected]> wrote:
>>>
>>>> Hello again everyone,
>>>> I thought I understood everything I needed to implement a theano Op
>>>> wrapping a scipy spline function through theanocode, but have been promptly
>>>> proven wrong (and was on a small family vacation).
>>>> Firstly, many thanks for the modifications done to theanocode to allow
>>>> for Piecewise and Undefined functions. I feel as though everything is in
>>>> place for me to solve my problem, but I am still either lacking or
>>>> mis-undertsanding something with regards to mapping a custom theano Op
>>>> through the theanocode.theano_function.
>>>>
>>>>>
>>>> I have created a quick test case to show what I have understood to date
>>>> which in my mind should have all the pieces necessary to function
>>>> correctly. I have made a small git repository on GitHub in order to share
>>>> this example and because I became fed up trying to figure out how to
>>>> publicly share a BitBucket repository (academic license-where I am hosting
>>>> my thesis project-which will be made public once functioning correctly).
>>>> https://github.com/gparsey/**KGMindep_SympyTheanoOp<https://github.com/gparsey/KGMindep_SympyTheanoOp>
>>>>
>>>> Running:
>>>> >>> ipython SymPy_Theano_KGM_indep.py
>>>> Evaluates three test cases: f0) simple arithmetic operation, f1) sympy
>>>> piecewise into theano and f2) sympy undefined function wrapped spline into
>>>> theano using a custom theano Op
>>>> Third test case crashes with:
>>>> <<<MissingInputError: ('An input of the graph, used to compute
>>>> TheanoInterpWrapOp.**theanointerp(y), was not provided and not given a
>>>> value', y)
>>>>
>>>> I apologize in advance for: the verbosity of the test cases (trying to
>>>> figure out what is happening within theanocode) using loc_theanocode
>>>> (modified sympy.printing.theanocode), the novice nature of my code and
>>>> whether I included correct references to the SymPy community. I am pretty
>>>> sure that I am either missing something crucial or doing something silly.
>>>> Any and all help/comments would be greatly appreciated.
>>>> Cheers,
>>>> Guy
>>>>
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>>>
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