Retrieve parsing problems — problems • readr

Readr functions will only throw an error if parsing fails in an unrecoverable way. However, there are lots of potential problems that you might want to know about - these are stored in the problems attribute of the output, which you can easily access with this function. stop_for_problems() will throw an error if there are any parsing problems: this is useful for automated scripts where you want to throw an error as soon as you encounter a problem.

problems(x = .Last.value)

stop_for_problems(x)

Arguments

x: A data frame (from read_*()) or a vector (from parse_*()).

Value

A data frame with one row for each problem and four columns:

row,col: Row and column of problem
expected: What readr expected to find
actual: What it actually got

Examples

x <- parse_integer(c("1X", "blah", "3"))
#> Warning: 2 parsing failures.
#> row col               expected actual
#>   1  -- no trailing characters   1X  
#>   2  -- no trailing characters   blah
problems(x)
#> # A tibble: 2 × 4
#>     row   col expected               actual
#>   <int> <int> <chr>                  <chr> 
#> 1     1    NA no trailing characters 1X    
#> 2     2    NA no trailing characters blah  

y <- parse_integer(c("1", "2", "3"))
problems(y)