Question in PCA - Differentiate problem

From: "Gol Yass" <gol_e_yass@xxxxxxxxx>
Date: Wed, 19 Oct 2005 12:34:06 +0400

Dear All

I am studying the PCA method , to reduce data dimensions.

I am facing a problem with differentiating the below term to find the
optimal coefficent ai (where i = 1 to M).

the equation is:
(x-m-sumof(aiei))^2 = 0

Could you recommend recourses or offer a solution ?
I really don't know how to differentiate series (sumof) !!

Thanks
Gol Yass

.

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Question in PCA - Differentiating problem
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