On Thursday, June 29, 2017 at 10:17:26 AM UTC-4, Sym wrote: > > I am using theano 0.9.0 and this function does not exist.. I can't find it > in the documentation either ! >
That would be theano.tensor.and_ with a trailing underscore. > And in the theano docs it says that : > __{abs,neg,lt,le,gt,ge,invert,and,or,add,sub,mul,div,truediv,floordiv}__ > Those elemwise operation are supported via Python syntax. > This is true, but the Python syntax that will call `__and__` is actually `a && b`, not `a and b`. So you can use `a && b`, `and_(a, b)`, or `a * b` if you prefer. > > Le mercredi 28 juin 2017 21:15:37 UTC-4, nouiz a écrit : >> >> Don't use the Python "and" operation. Use theano.tensor.and(a,b) instead. >> I think it will fix your problem. >> >> Le mer. 28 juin 2017 10:26, Sym <mass.c...@gmail.com> a écrit : >> >>> >>> I want to build a piecewise function with theano, for instance a >>> function that is nonzero only in the interval [2,3]. >>> >>> Here is the minimal code reproducing the error : >>> >>> >>> import theano >>> import theano.tensor as T >>> import numpy as np >>> import matplotlib.pyplot as plt >>> >>> r = T.scalar() >>> gate = T.switch( T.ge(r,2.) and T.le(r,3.) , 1., 0.) >>> f = theano.function([r],gate) >>> x = np.arange(0.,4.,0.05,dtype='float32') >>> y = [f(i) for i in x] >>> plt.plot(x,y) >>> >>> >>> >>> The result is the following : https://i.stack.imgur.com/XMQme.png >>> >>> Which is clearly not correct : only one condition is satisfied here. >>> >>> >>> If I replace T.switch by theano.ifelse.ifelse the result is the same... >>> >>> Is it a known bug, or am I missing something here? >>> >>> >>> Thanks a lot ! >>> >>> -- >>> >>> --- >>> 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...@googlegroups.com. >>> 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 theano-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.