add_blockwise_grouplasso: raise NotImplementedError?

[YikSanChan]

Hi,

I have read the ISS paper on arxiv, and fail to understand the code. In add_blockwise_grouplasso, It raises NotImplementedError('Not debugged. And the implementation is very slow when block is small.')

But the zero out part inside the method is definitely "ISS" in the paper. Does it mean, even though the code is slow, you still currently use this method to produce the result in the paper?

Thank you.

[YikSanChan]

And in this line, https://github.com/wenwei202/iss-rnns/blob/5c8f497ada4d87bc379c285374b78fbd0ab0074b/ptb/ptb_word_lm.py#L377, it actually use structure lasso instead of group lasso.

Still the same question as above, thank you!

[wenwei202]

@YikSanChan structure lasso is one example of group lasso. In the code, I call it structure lasso because we can learn the ISS by removing one group of weights. Please ignore add_blockwise_grouplasso, which is never used for the paper.