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Re: PCA
Posted:
Feb 16, 2013 12:57 AM


robert bristowjohnson wrote: > On 2/15/13 9:15 PM, Richard Owlett wrote: >> glen herrmannsfeldt wrote: >>> In comp.dsp RichD <r_delaney2001@yahoo.com> wrote: >>>> I've been trying to grok principal component analysis >>>> recently, but it isn't clicking. What's the motivation >>>> and purpose of PCA? >>> >>>> I've studied linear algebra, and familiar with singular >>>> value >>>> decomposition, is it somehow related to that? >>> >>> The wikipedia page looks pretty good, and does explain >>> that it >>> is connected to SVD. It also has some nice pictures. >>> >>>  glen >>> >> >> If you are referring to >> http://en.wikipedia.org/wiki/Principal_component_analysis, >> >> YUKK! >> >> Back in midst of last century that would be taken as >> absolute proof that >> engineers could not write. >> Are they now being challenged ????? > > yeah, i couldn't decode the wikipedia article either. > > but i typed in "principal component analysis tutorial" into > Google and got some pretty good hits. the one by this > Lindsey Smith guy looks pretty good. > >
ROFL SNICKER *SNICKER* etc etc ;/
One of the reasons I was picking on Mr. Herrmannsfeldt was lack of reference(s). I'm going to use a WAG that you are referring to http://www.ce.yildiz.edu.tr/personal/songul/file/1097/principal_components.pdf
Initially that looks more comprehensible. BUT Doth it say anything Chris didn't? {in a more concise manner} snicker snicker ;/



