Skip to content

Matching does not work with list-columns? #85

Open
@turbanisch

Description

@turbanisch

I was trying to match dates to intervals, first as a toy example with integers, then with dates. Using integer ranges instead of date intervals requires me to make use of list-columns in the first tibble and the joined dataframe contains no rows. When using actual dates (i.e., without list-columns), everything works as expected and the joined dataframe is not empty.

Is it correct that the list-column is causing this behavior (or is my code flawed)? If so, it would be great if either this functionality could be enabled or if a warning would be shown, I think.

library(tidyverse)
library(lubridate, warn.conflicts = FALSE)
library(fuzzyjoin)

# set up with list column
df_int <- tibble(
  video = c("A", "B", "B"),
  promo_interval = list(1:4, 3:5, 7:9)
)

df_dates <- tibble(
  video = c("A", "A", "A", "B"),
  views = c(234, 235, 166, 435),
  date = c(2, 3, 7, 7)
)

# join yields empty dataframe
fuzzy_inner_join(
  df_dates,
  df_int, 
  by = c("video", "date" = "promo_interval"),
  match_fun = list(`==`, `%in%`)
)
#> # A tibble: 0 × 5
#> # … with 5 variables: video.x <chr>, views <dbl>, date <dbl>, video.y <chr>,
#> #   promo_interval <list>

# with dates/intervals (no list-column)
df_int <- tibble(
  video = c("A", "B", "B"),
  promo_interval = c(interval("20220501", "20220504"), 
                     interval("20220503", "20220505"), 
                     interval("20220507", "20220509"))
)

df_dates <- tibble(
  video = c("A", "A", "A", "B"),
  views = c(234, 235, 166, 435),
  date = c(ymd("20220502"), 
           ymd("20220503"), 
           ymd("20220507"), 
           ymd("20220507"))
)

# join results as expected
fuzzy_inner_join(
  df_dates,
  df_int, 
  by = c("video", "date" = "promo_interval"),
  match_fun = list(`==`, `%within%`)
)
#> # A tibble: 3 × 5
#>   video.x views date       video.y promo_interval                
#>   <chr>   <dbl> <date>     <chr>   <Interval>                    
#> 1 A         234 2022-05-02 A       2022-05-01 UTC--2022-05-04 UTC
#> 2 A         235 2022-05-03 A       2022-05-01 UTC--2022-05-04 UTC
#> 3 B         435 2022-05-07 B       2022-05-07 UTC--2022-05-09 UTC

Created on 2022-05-28 by the reprex package (v2.0.1)

Metadata

Metadata

Assignees

No one assigned

    Labels

    No labels
    No labels

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions