Vlad, if you are going to cite the Mazack paper, you should also look into
the original paper by Kim and Park (2006) which proposes the sparse NMF
model ( the one which is currently implemented by Scikit-learn).
For the sparse NMF model by Hoyer (2004), some benchmarks can be found in
my ICLR pape
Vamsi, do you have any benchmarks for your implementation? The biggest
reason why we didn't change the current implementation yet is that it
was hard to find something else that is consistently faster & better.
Here are some benchmarks I did last time I looked at this, when I
wanted to replace the
i will never post a docstring again :)
sorry for the noise
michael
On Wednesday, June 25, 2014, Vlad Niculae wrote:
> Hi,
>
> Allow me to clarify. We don't implement Hoyer's sparse update rule
> indeed (it shouldn't say "this implements", I initially cited Hoyer
> for motivating sparseness cons
Hi,
Allow me to clarify. We don't implement Hoyer's sparse update rule
indeed (it shouldn't say "this implements", I initially cited Hoyer
for motivating sparseness constraints in NMF). Instead, we implement a
version of sparse NMF with a clear (but not particularly elegant)
objective function, fo
Don't believe all you read :-).
It says that but implements something else.
~Vamsi.
On Wed, Jun 25, 2014 at 10:48 AM, Michael Eickenberg <
michael.eickenb...@gmail.com> wrote:
> https://github.com/scikit-learn/scikit-learn/blob/master/sklearn/decomposition/nmf.py#L346
>
> References
> -
https://github.com/scikit-learn/scikit-learn/blob/master/sklearn/decomposition/nmf.py#L346
References
--
This implements
C.-J. Lin. Projected gradient methods
for non-negative matrix factorization. Neural
Computation, 19(2007), 2756-2779.
http://www.csie.ntu.ed
Yes, thats a different sparse model than the one in Hoyer, 2004 (most
likely the one by Kim and Park).
Maybe, Vlad or someone else can comment on that.
~Vamsi.
On Wed, Jun 25, 2014 at 10:15 AM, Alexandre Gramfort <
alexandre.gramf...@telecom-paristech.fr> wrote:
> hi,
>
> have you played with t
hi,
have you played with the sparseness parameter of the NMF estimator?
Alex
On Wed, Jun 25, 2014 at 3:42 PM, Vamsi Krishna Potluru
wrote:
> Hello,
>
> I have worked a bit on the sparse NMF model proposed by Hoyer [1]. The
> paper is mentioned in the Scikits NMF module but AFAIK the model is
Hello,
I have worked a bit on the sparse NMF model proposed by Hoyer [1]. The
paper is mentioned in the Scikits NMF module but AFAIK the model is
currently not implemented. Recently, we proposed an efficient algorithm
based on block coordinate descent [2]. A reference python implementation is
ava
