r - 从年（双）和周数（字符）构造年周

Question

这是我的数据示例

# A tibble: 300 x 5
    year week  department_id media_tpv mediana_tpv
   <dbl> <chr>         <dbl>     <dbl>       <dbl>
 1  2019 00                3      90.4         65 
 2  2019 00                5     194.         117.
 3  2019 00               65     173.         117.
 4  2019 00               93     183.         105 

现在，假设我想从中构造一个tsibble::yearweek()基于 - 的索引。我尝试将年份和星期粘贴在一起，然后将其传递给yearweek()但无法正确解析。

输入：

df <- structure(list(year = c(2019, 2019, 2019, 2019), week = c("00", 
"00", "00", "00"), department_id = c(3, 5, 65, 93), media_tpv = c(90.4, 
194, 173, 183), mediana_tpv = c(65, 117, 117, 105)), row.names = c(NA, 
-4L), class = c("tbl_df", "tbl", "data.frame"))

Answer 1

您只需要将两列强制转换为yearweek查找的格式：

df$week <- paste0('W', df$week)
df$yearweek <- paste0(df$year, ' ', df$week)
yearweek_column <- yearweek(df$yearweek)

然后你可以检查：

print(yearweek)

这给了你：

[1] "2018 W52" "2018 W52" "2018 W52" "2018 W52"

tidyverse解决方案：

df %>%
  mutate(week = paste0('W', week),
         yearweek = paste0(year, ' ', week),
         yearweek_column = yearweek(yearweek))