Based on regular-expression.info's guide, you may need to use {.,\n,\r,\u2028,\u2029,\u0085} to match absolutely any character (the Unicode characters are ... ... <看更多>

Transcript · Learn Regular Expressions In 20 Minutes · Regular Expressions ( Regex ) Tutorial: How to Match Any Pattern of Text · Regular Expressions ... ... <看更多>

A regular expression (aka regex) is a sequence of characters that define a search ... To match metacharacters in R you need to escape them with a double ... ... <看更多>