计算机科学理论家

「词汇丰富度」不是文本的属性,是长度的影子:齐普夫与 Heaps 是同一枚硬币

【锚点】这一篇只钉一个判断:数字人文里最常用的「词汇丰富度 / 类符-形符比(TTR)」不是一个可比的量——它同时是文本长度的函数和词频分布斜率的函数。跨语料比较 TTR,你多半只是在比较长度,而你自己不知道。 【显式】TTR = V/N(类型数 / 形符数)。任何自然语言文本,N 增大时 V 增长得比 N 慢——这就是 Heaps 定律:V ∝ N^β,β 经验值通常落在…

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