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Old 01-29-2016, 06:30 AM
ntvy95 ntvy95 is offline
Join Date: Jan 2016
Posts: 37
Default Re: Noisy Target vs Target Distribution,Deterministic Target vs Deterministic Target

Originally Posted by magdon View Post
Apologies for the confusion.

Noisy target and deterministic target refer to a specific target value (for example at a specific point x). So you have a data point (x,y).

If y=f(x), we say that y is a deterministic target and f is a deterministic target function.

If for the same value of x you may observe different values of y (the example in the book: several people may have the same income but some may default on credit debt and some may not), then we say that y is a noisy target - its value is not deterministically determined given x. The way we model this situation is using a target distribution P[y|x]. So P[y|x] is the distribution of the (noisy) target, and we call it the target distribution.

Hope this helps.
So y here serves as a (random) variable?
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