Regarding the blog article and the dollar signs: I think it all stems back to me using html paragraph markers on each paragraph. However I've just looked at the source for some of the other blog articles and see I didn't need to do that. Maybe getti…
My experiences have been that if you do "dollars without spaces" the new wiki does math correctly. If I do the "prep for wordpress" thing of leaving spaces it seems like they don't work. I have no idea why!
BTW: edit regarding validation set issue …
I think I'll reword it to make it clear that there are approaches that use more than just a training and test set without actually mentioning a validation set as an example (so I don't have to explain it further).
Just for this conversation (not th…
I've changed the "statistical modelling and inference" link to a more appropriate one, added an incredibly brief explanation of the validation set and complete the sparse prior example.
Re #20: I think there are a lot of things that people think of as "statistical" that have no "theory about the problem domain" in them, eg, PCA, linear discriminant analysis, regression. Even saying they're thought of as statistical is coming down a…
Re 19:
The wikipedia link is to the closest concept I could find, but you're right it's not a perfect match. If there's anything better...
On the more general point, I'm basically trying to dispel the myth that "cool" machine learning people do li…
Regarding theory vs physical, I'm not sure. The article isn't an attempt to be a general machine learning article but to sate some of the things it would be helpful to refer to from other El Nino articles. (I'm too lazy to write Nino correctly on th…
WRT sparsity: If you read papers around the LASSO, etc, you see a general theme that putting in a sparseness prior discourages the model from using randomly occurring correlations between "not actually relevant" inputs and outputs to improve its ove…
By "robust to affine changes" I mean the goal of the SURF interest point operator is to find a patch P in an image such that
SURF(P) approximately equals SURF(A(P))
(same for SIFT) where A is an affine mapping. This is a good design goal for image…
So I've reached the point where I can't think of anything else I want to do to the article. If anyone has any comments/changes let me know and I'll try to address them, but otherwise I think it's finished. (From an "interesting layout" perspective i…
So the point I was making is that SIFT/SURF are designed to be "robust to affine changes" rather than "interesting" -- SIFT/SURF will throw out patterns that are more interesting in favour of ones that should be more robust. It's not clear that this…
So SIFT/SURF features are designed to find gradient extremum patterns which are highly robust to (ie, almost invariant to) affine transformations (which are a big problem when trying to match points between real-world images). Is it obvious that thi…
Thanks for the comments. I've incorporated Graham's suggestsions. While Jim's is very interesting I also think it's a much more advanced topic that deserves its own post (maybe from Jim). I've done some tweaking & typo correction. The other thin…
Hi everyone. My approach to writing articles is, once I've got a list of ideas, to write some sketchy text to see what flows into what. (It's the only way I can find of writing that doesn't result in lots of forward references and other problems.) S…
Just for the record, here's some Matlab/Octave code for evaluating a set of bilinear regression coefficients. I'm not putting it on a more permanent place because it's so ugly, inefficient and is unbelievably slow even for smaller test examples when…
When I referred to it as "boilerplate", what I meant was the fact it's mentioned prominently is unlikely to be something specific about this particular paper; however it's still something that you ought to verify that everyone is OK with circulating…
I tend to look at it more as a quid pro quo to encourage "timely" submission for publication given that we've ended up with a system where reviewers who work as they find the spare time and other delays mean that for a conference it's usually about …