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发帖数: 768 | 1 【 以下文字转载自 Statistics 讨论区 】
【 原文由 fyld 所发表 】
通过这种方法怎么计算entropy?
感谢！
或如何理解下面导出的Nc and S?
Suppose there n particles randomly distributed in a region of N positions.
Even if n is much smaller than N, there is a nonzero chance
for coincidence, i.e., some positions will get more than one particles.
Since the probability for a particle to fall in any given position is 1/N,
the number of coincidences is easily estimated by:
Nc=n(n-1)/2 *1/N
(why?)
Let us define R to be the coincidence rate which is the |
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