获取R中两个单词之间的距离 [英] Getting distance between two words in R

问题描述

假设我在文件中有一行:

Say I have a line in a file:

string <- "thanks so much for your help all along. i'll let you know when...."

我想返回一个值，指示单词 know 是否在 help 的 6 个单词之内.

I want to return a value indicating if the word know is within 6 words of help.

推荐答案

这本质上是 Crayon 作为基本功能的答案的一个非常粗略的实现:

This is essentially a very crude implementation of Crayon's answer as a basic function:

withinRange <- function(string, term1, term2, threshold = 6) {
  x <- strsplit(string, " ")[[1]]
  abs(grep(term1, x) - grep(term2, x)) <= threshold
}

withinRange(string, "help", "know")
# [1] TRUE

withinRange(string, "thanks", "know")
# [1] FALSE

<小时>

我建议您对可用的文本工具有一个基本的了解，并使用它们来编写这样的函数.注意 Tyler 的评论:在实施时，这可以匹配多个术语(you"将匹配you"和your")，从而产生有趣的结果.您需要确定要如何处理这些情况才能获得更有用的功能.

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I would suggest getting a basic idea of the text tools available to you, and using them to write such a function. Note Tyler's comment: As implemented, this can match multiple terms ("you" would match "you" and "your") leading to funny results. You'll need to determine how you want to deal with these cases to have a more useful function.

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