Question

获得一个数据框，其数字拼写为英文：

  df.en <- data.frame(var1 = c("two thousand","one hundred", "seventyfour"),
                 var2 = c("twenty two","fifty", "six"), stringsAsFactors = F)


> df.en
          var1       var2
1 two thousand twenty two
2  one hundred      fifty
3  seventyfour        six

快速＆amp;脏用户定义函数来猜测是否可以转换为数字。（下同）

将函数应用于某些元素进行测试时，工作正常：

> translateToNumbers("eighteen")
[1] 18
> translateToNumbers("one hundred and twenty two")
[1] 122

问题在于使用lapply来翻译上述数据框：

> lapply(df.en, translateToNumbers)

只返回最后评估的值

$var1
[1] 74

$var2
[1] 6

如果可能，我们需要翻译所有数据框。下面是函数：

library(magrittr)

    translateToNumbers <- function(x) {
          x[] <- gsub("^thousand", "1000)+", x , ignore.case = T) %>%
          sub("eleven", "+11", . , ignore.case = T) %>%
          gsub("twelve", "+12", . , ignore.case = T ) %>%
          gsub("thirteen", "+13", . , ignore.case = T) %>%
          gsub("fourteen", "+14", . , ignore.case = T) %>%
          gsub("fifteen", "+15", . , ignore.case = T) %>%
          gsub("sixteen", "+16", . , ignore.case = T) %>%
          gsub("seventeen", "+17", . , ignore.case = T) %>%
          gsub("eighteen", "+18", . , ignore.case = T) %>%
          gsub("nineteen", "+19", . , ignore.case = T) %>%
          gsub("twenty", "+20", . , ignore.case = T) %>%
          gsub("thirty", "+30", . , ignore.case = T) %>%
          gsub("forty", "+40", . , ignore.case = T) %>%
          gsub("fifty", "+50", . , ignore.case = T) %>%
          gsub("sixty", "+60", . , ignore.case = T) %>%
          gsub("seventy", "+70", . , ignore.case = T) %>%
          gsub("eighty", "+80", . , ignore.case = T) %>%
          gsub("ninety", "+90", . , ignore.case = T) %>%
          gsub("one hundred", "+100", . , ignore.case = T) %>%
          gsub("two hundred", "+200", . , ignore.case = T) %>%
          gsub("three hundred", "+300", . , ignore.case = T) %>%
          gsub("four hundred", "+400", . , ignore.case = T) %>%
          gsub("five hundred", "+500", . , ignore.case = T) %>%
          gsub("six hundred", "+600", . , ignore.case = T) %>%
          gsub("seven hundred", "+700", . , ignore.case = T) %>%
          gsub("eight hundred", "+800", . , ignore.case = T) %>%
          gsub("nine hundred", "+900", . , ignore.case = T) %>%
          gsub("one", "+1", . , ignore.case = T) %>%
          gsub("two", "+2", . , ignore.case = T) %>%
          gsub("three", "+3", . , ignore.case = T) %>%
          gsub("four", "+4", . , ignore.case = T) %>%
          gsub("five", "+5", . , ignore.case = T) %>%
          gsub("six", "+6", . , ignore.case = T) %>%
          gsub("seven", "+7", . , ignore.case = T) %>%
          gsub("eight", "+8", . , ignore.case = T) %>%
          gsub("nine", "+9", . , ignore.case = T) %>%
          gsub("millions", ")*(1000000)+(0", . , ignore.case = T) %>%
          gsub("million", ")*(1000000)+(0", . , ignore.case = T) %>%
          gsub("thousand", ")*(1000)+(0", . , ignore.case = T) %>%
          gsub("ten", "+10", . , ignore.case = T) %>%
          gsub("and", "", . , ignore.case = T) %>%
          gsub(" ", "", . , ignore.case = T) %>%
          gsub("^", "(0", . , ignore.case = T) %>%
          gsub("$", ")", . , ignore.case = T) %>%
          gsub("\\(0\\(", "", . , ignore.case = T ) %>%
          gsub("\\+\\+", "\\+\\(", . , ignore.case = T ) %>%
          gsub("\\)\\+\\)", "\\)", . , ignore.case = T )
     return(eval(parse( text = x)))
    }

Lapply函数只对数据帧返回最后一个值

0 个答案: