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Re: PCA
Posted:
Feb 16, 2013 12:57 AM
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robert bristow-johnson 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 ;/
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