we cannot draw samples from p(x) directly, but can evalute p(x) up to a normalising constant. what is the last clause's meaning?
s*s
2 楼
http://en.wikipedia.org/wiki/Normalizing_constant "In probability theory, a normalizing constant is a constant by which an everywhere nonnegative function must be multiplied in order that the area under its graph is 1, i.e., to make it a probability density function or a probability mass function." 太深奥了,看数学书吧。
【在 G***G 的大作中提到】 : we cannot draw samples from p(x) directly, but can : evalute p(x) up to a normalising constant. : what is the last clause's meaning?
n*t
3 楼
What is the context of the sentence? How is p(x) defined?
【在 G***G 的大作中提到】 : we cannot draw samples from p(x) directly, but can : evalute p(x) up to a normalising constant. : what is the last clause's meaning?
O*e
4 楼
It means that you cannot evaluate the exact value of p(x), but it is possible to evaluate the value of the product c*p(x) where c is a an unknown constant with the property that the integral of c*p(x) from x=-infinity to x=+infinity is equal to 1.
【在 G***G 的大作中提到】 : we cannot draw samples from p(x) directly, but can : evalute p(x) up to a normalising constant. : what is the last clause's meaning?