Consider the cost matrix for a two-class problem. Let C(+, +) = C(?, ?) = p, C(+, ?) = C(?, +) = q, and q>p. Show that min- imizing the cost function is equivalent to maximizing the classifier’s accuracy.
What will be an ideal response?
The total cost is F = p(a + d) + q(b + c).
Since acc = a+d
N , where N = a + b + c + d, we may write
Because p ? q is negative, minimizing the total cost is equivalent to
maximizing accuracy.
You might also like to view...
The asterisk (*) after an element means that:
a) there are many occurrences of that item. b) there could be any number of occurrences of that item. c) that item could appear but at most once. d) All of the above
Modern browsers support using the CSStransformproperty to apply atransform. _________________________
Answer the following statement true (T) or false (F)
One major disadvantage of encryption is that ____.
A. it increases the system's overhead B. it is inconvenient for users C. it is prohibitive in cost D. it is often ineffective
What technologies have largely replaced infrared (IR) technology?
What will be an ideal response?