R多重模糊匹配agrep创建变量 [英] R multiple fuzzy match agrep create variable

问题描述

R的新手.我想通过创建一个变量(是/否)来创建测试，以检查名字或姓氏是否与电子邮件地址模糊匹配.如果是这样，请在该行后面附加一个是"变量.

New to R. I would like to create a test by creating a variable (yes/no) that checks to see if first name OR last name fuzzy match to email address. If so, append a 'yes' variable to that row.

数据示例:

id firstname lastname email address match
1 patrick boyles [e-mail] yes
2 zeke cosmos [e-mail] yes
3 foo foo [e-mail] no

我了解我需要使用agrep.令我困惑的是如何告诉R检查2列(名字和姓氏)并且仅在该行中检查.

I understand that I need to use agrep. What confuses me is how to tell R to check 2 columns (first name and last name) and only check within that row.

谢谢 -新手

推荐答案

以下是一些开始

library(stringdist) # install.packages("stringdist") b4, if you need to
df <- read.table(header = TRUE, text = "id firstname lastname emailaddress match
1 patrick boyles [e-mail] yes
2 zeke cosmos [e-mail] yes
3 foo foo [e-mail] no")
df$match2 <- ifelse(with(df, stringdist(a = paste0(firstname, lastname), 
                                        b = sub("(.*)@.*", "\\1", emailaddress), 
                                        method = "lcs")) <= 7, 
                    "yes", "no")
df
#   id firstname lastname      email.address match match2
# 1  1   patrick   boyles [e-mail]   yes    yes
# 2  2      zeke   cosmos     [e-mail]   yes    yes
# 3  3       foo      foo     [e-mail]    no     no

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