Question

我的代码中有什么问题？我不知道如何结合结果。这个代码是交付数据，搜索运单很麻烦，所以我尝试了！但这很难。

这是代码，

library(stringr)
Houseno <- c("1Z30A2920429127213","1Z30A2920429463047","1Z30A2920422913297","1Z30A2920439995052","1Z30A2920423741926")
 Houseno
 for (i in Houseno)
{
 url <- (paste0("https://iship.com/trackit/track.aspx?Track=",i))
 line <- readLines(url, encoding = "UTF-8")

 #number
 upshouse <- line[which(str_detect(line,"UPS Tracking Number:"))] 
 upshouse <- gsub("UPS Tracking Number:|<.+?>|\t|&nbsp;", "", upshouse)

 #result
 upsresult <- line[which(str_detect(line,"Status:"))]
 upsresult <- gsub("Status:|<.+?>|\t", "", upsresult)

 #com
 com <- data.frame(NO=upshouse, CP=upsresult)
 print(com)
}

此代码的结果是

              NO        CP
1 1Z30A2920429127213 DELIVERED
              NO        CP
1 1Z30A2920429463047 DELIVERED
              NO        CP
1 1Z30A2920422913297 DELIVERED
              NO        CP
1 1Z30A2920439995052 DELIVERED
              NO        CP
1 1Z30A2920423741926 DELIVERED

但我希望这个结果如下，

          NO            CP
1 1Z30A2920429127213 DELIVERED
2 1Z30A2920429463047 DELIVERED
3 1Z30A2920422913297 DELIVERED
4 1Z30A2920439995052 DELIVERED
5 1Z30A2920423741926 DELIVERED

谢谢。

Answer 1

您可以将中间结果添加到列表中，并按如下方式对其进行rowbind：

library(stringr)
Houseno <- c("1Z30A2920429127213","1Z30A2920429463047","1Z30A2920422913297","1Z30A2920439995052","1Z30A2920423741926")

result <- vector('list',length(Houseno)) #initialize list with correct length
for (i in 1:length(Houseno))
{
  url <- (paste0("https://iship.com/trackit/track.aspx?Track=",Houseno[i]))
  line <- readLines(url, encoding = "UTF-8")

  #number
  upshouse <- line[which(str_detect(line,"UPS Tracking Number:"))] 
  upshouse <- gsub("UPS Tracking Number:|<.+?>|\t|&nbsp;", "", upshouse)

  #result
  upsresult <- line[which(str_detect(line,"Status:"))]
  upsresult <- gsub("Status:|<.+?>|\t", "", upsresult)

  #com
  com <- data.frame(NO=upshouse, CP=upsresult)
  result[[i]] <- com # add result to list

}

do.call(rbind,result) #rowbind the list to a single dataframe

结果：

                  NO        CP
1 1Z30A2920429127213 DELIVERED
2 1Z30A2920429463047 DELIVERED
3 1Z30A2920422913297 DELIVERED
4 1Z30A2920439995052 DELIVERED
5 1Z30A2920423741926 DELIVERED

希望这有帮助！

R重复代码，抓取结果

1 个答案: