4 ms·
So many things wri g with it. PCA and SVD are placed on opposite nodes, but PCA is actually computed using SVD!
by aquafox 5y ago
So many things wri g with it. PCA and SVD are placed on opposite nodes, but PCA is actually computed using SVD!
- ogogmad 5y agoI don't understand what use case they've given for SVD. Are they suggesting using it for compressing an image? Because that's a terrible idea, with an algorithmic complexity of O(n^3) and a very bad compression ratio. [edit] Just to underscore the point that you should never use SVD for compression except as a teaching example consider a comment here: https://mathoverflow.net/questions/408504/listing-applications-of-the-svd https://mathoverflow.net/questions/408504/listing-applicatio... The comment says That's a very nice way of getting some intuition about the SVD. But this is by no means an application of the SVD. Compression [sic] images this way is terrible by any standard (you get very bad image for still quite large storage and computing the compression is very slow). This is by an expert.
- ogogmad 5y agoTypo: "wri g" should be "wrong".
- samhw 5y agoAh, dammit, I thought he meant "wri g". This changes the meaning entirely. Well, I disagree with that, but I thought there was some real insight in the observation that there are many things wri g with it.
- deleted 5y ago[deleted]
- ogogmad 5y agoLooking through your comment history, you appear to have a history of passive-aggressive comments like the one above. A typo as extensive as "wri g" is pretty hard to read at first glance, because it has an intervening space.