LFD Book Forum

LFD Book Forum (http://book.caltech.edu/bookforum/index.php)
-   Chapter 1 - The Learning Problem (http://book.caltech.edu/bookforum/forumdisplay.php?f=108)
-   -   Ch 1: Question on f and h functions (http://book.caltech.edu/bookforum/showthread.php?t=4608)

digitalgirl 07-11-2015 11:20 AM

Ch 1: Question on f and h functions
 
Okay I understand that the h function is what we're after. There can be many h functions from the hypothesis space H and we're after the h function that models the data optimally. The f function has been repeatedly stated as unknown. What I don't understand is page 21, the equation. How can the "fraction D where f and h disagree" be an accurate statement when f is considered unknown. Can't test if they disagree when f is unknown to begin with. I hope someone can clarify this for me. :clueless:

digitalgirl 07-11-2015 07:14 PM

Re: Ch 1: Question on f and h functions
 
Okay I got it. The f function is what's being learned which gets continually compared to the hypothesis. Going back to Mitchel's book on Machine Learning. The f function would be the target concept function.


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