Thanks, Fred. On Thu, Aug 10, 2017 at 6:41 PM, Frédéric Bastien < frederic.bast...@gmail.com> wrote:
> The problem is smat(x) > > It return list of list of Theano variable. This isn't a Theano variable > itself. You can have Theano contact all of this correctly to make a new > corresponding Theano variable with: > > v,w=nlin.eigh(theano.tensor.stacklists(smat(x))) > > Fred > > On Tue, Aug 1, 2017 at 7:37 AM Jyotiranjan Beuria < > jyotiranjan.beu...@gmail.com> wrote: > >> Hi All, >> >> I am trying to calculate the derivative of a function that >> depends on eigenvalues of a matrix. I am new to Theano. >> Here is a snippet of the code. >> import numpy as np >> >> import theano >> import theano.tensor as T >> import theano.tensor.nlinalg as nlin >> >> def myFun(X,a=2): >> s=T.dmatrix('s') >> x=T.dvector('x') >> a=T.dscalar('a') >> def smat(x): >> return [[x[0]**2,x[1],x[2]], >> [x[1]**2,a*x[1],a*X[0]], >> [x[2]**2,x[0],a*x[1]]] >> v,w=nlin.eigh(smat(x)) >> TG=T.grad(v,x) >> Eigen,Grad = theano.function([x], [v,TG],allow_input_downcast=True ) >> >> ev=Eigen(X) >> der=Grad(X) >> print ev,der >> >> myFun([2,3,5]) >> >> Can anyone help me to solve this problem? >> >> Regards, >> Jyotiranjan >> >> -- >> >> --- >> 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 theano-users+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> > -- > > --- > 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/2FKrpaS4Q7Q/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > theano-users+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- Jyotiranjan Beuria Ph.D Student, HRI Allahabad -- --- 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 theano-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.