Suppose I have:

$\displaystyle \theta=(X^\top X)^{-1}X^\top y$

What is the effect on the value $\displaystyle \theta$ if ($\displaystyle X^\top X$) is almost singular?

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- Oct 29th 2010, 03:01 AMnoob mathematicianEffect of singuar
Suppose I have:

$\displaystyle \theta=(X^\top X)^{-1}X^\top y$

What is the effect on the value $\displaystyle \theta$ if ($\displaystyle X^\top X$) is almost singular? - Oct 29th 2010, 04:15 AMDrexel28
- Oct 29th 2010, 05:41 AMnoob mathematician
Yes that's what I mean. Does it make sense?