我有一些麻烦,在R的正则表达式字符串我试图使用正则表达式从字符串(从网上刮)提取标签如下: str <- "\n\n\n \n\n\n “Don't cry because it's over, smile because it happened.”\n ―\n Dr. Seuss\n\n\n\n\n \n tags:\n attributed-no-source,\n cry,\n c
我试图从向量提取年龄(数值),tryied以下,但凭着努力 例子: - a <- "age-32 agge32 age 45 aage 56 agee 34"
b <- gsub("[Aa]g.e?"," age ",a)
sa <- strsplit(x=b, split="\\s")
age <- stringr::str_extract(sa, "(age?)(