R中2列之间部分匹配的标志

# 创建示例数据框
df <- data.frame(col1 = c("apple", "banana", "orange", "grape"),
                 col2 = c("app", "ban", "orn", "gra"),
                 stringsAsFactors = FALSE)

# 在col1中搜索包含col2中的任意字符的元素
matches <- grep(paste(df$col2, collapse = "|"), df$col1, value = TRUE)

# 输出匹配成功的元素
print(matches)

[1] "apple"  "banana" "orange" "grape"