git log rel-0.6rc1.. | grep --color=auto -i merge | less
done up to PR 1084
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Release Notes (DRAFT)
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Theano 0.6rc2 (November ?st, 2012)
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Highlight:
* Fix a few regression inserted in 0.6rc1
* A few new features.
* Speed up.
* Scan fix.
* Crash fix
Commiters for this rc2 only:
Razvan Pascanu
Pascal Lamblin
Frederic Bastien
Ian Goodfellow
Jeremiah Lowin
Caglar Gulcehre
Jey Kottalam
Matthew Rocklin
abalkin
Regression in 0.6rc1 fixed:
* Fix the scan gradient dtype issue. In 0.6rc1, some upcast where inserted. (Razvan P.)
* Now grad() will do as before the 0.6rc1 for float, i.e. the grad dtype will be the same as the inputs inside the graph. If you ask for the direct grad, it will return the computed dtype. (Pascal L.)
Wrong results fix:
* Scan fix in some case didn't returned the good results. (Razvan P., reported by Jeremiah L.)
This happen if you have a state with only neg tap and the outputs of the state is a function of some sequence.
If you have multiple state, there was no problem.
* Fixed bug in Scan with multiple outputs,
where one output would sometimes overwrite another one. (Razvan P.)
* Clip.grad treated the gradient with respect to the clipping boundary as always 0. (Ian G.)
Interface change:
* Now we do not support unaligned ndarray in python code. (Frederic B.)
We did not support it in c code and supporting it in python code made
the detection harder.
* Now we only support officialy scipy 0.7.2 and numpy 1.5.0 (Frederic B.)
We weren't and aren't testing with older version.
* The theano.sparse.SparseType is available even when scipy is not (Frederic B.)
* Fixes issue where members of consider_constant grad parameter
were treated differently from Constant variables. (Ian G.)
* Remove the parameter g_cost to theano.grad(). (Ian G.)
Use the new more powerfull parameter known_grads instead.
NumPy interface support:
* theano.tensor.where is an alias for theano.tensor.switch to support NumPy semantic. (Ian G.)
* TensorVariable objects now have dot, argmin, argmax, clip, conj, repeat, trace, std, round,
ravel and argsort functions and the real and imag properties as numpy.ndarray object.
The functionality was already available in Theano. (abalkin)
Speed up:
* A C version of the SoftMax op (Razvan P.)
There was c code for the softmax with bias code.
* Faster GpuIncSubtensor (Ian G.)
* Faster copy on the GPU for 4d tensor. (Ian G.)
* The fix of flatten infer_shape re-enable an optimization (Pascal L.)
* The bug was introduced in 0.6rc1.
* Enable inc_subtensor on the GPU when updating it with a float64 dtype. (Ian G.)
It was causing an optimization warning.
* Make DeepCopy reuse preallocated memory. (Frédéric B.)
* Move then convolution to the GPU when the image shape and logical image shape differ. (Frédéric Bastien)
* C code for the View Op (Razvan P., Pascal L.)
New Feature:
* Added a monitoring mode "MonitorMode" as a debugging tool. (Olivier D.)
* Allow integer axes when keepdims==True (Jeremiah Lowin)
* Add erfinv and erfcinv op. (Jey Kottalam)
* Added tensor.batched_dot(). (Caglar Gulcehre)
It use scan behind the scene, but making doing this easier.
* theano.get_constant_value(x) (Frederic B.)
This try to do have x as a constant int.
This do some constant folding to try to convert x into an int.
