Generic to parse text into numeric vectors. This was initially designed for a robust interpretation of text input in teal modules.
Usage
as_num(str)
# Default S3 method
as_num(str)
# S3 method for class 'character'
as_num(str)
# S3 method for class 'numeric'
as_num(str)
# S3 method for class 'factor'
as_num(str)
# S3 method for class 'logical'
as_num(str)Value
As vector of numeric if directly parsed from numeric or boolean.
A list of numeric if parsed from a character string, each character string
associated with an list item.
Details
The function is intended to extract any numeric from a character string, factor levels, boolean and return a vector of numeric.
Examples
dta <- list(
character = c("text10,20.5letter30.!", "!-.40$$-50e5[", NA),
factor = factor(c("]+60e-6, 7.7%%8L", "%90sep.100\"1L", NA_character_)),
numeric = c(1, -5e+2, NA),
logical = c(TRUE, FALSE, NA)
)
lapply(dta, as_num)
#> $character
#> $character[[1]]
#> [1] 10.0 20.5 30.0
#>
#> $character[[2]]
#> [1] -4e-01 -5e+06
#>
#> $character[[3]]
#> [1] NA
#>
#>
#> $factor
#> $factor[[1]]
#> [1] 0.00006 7.70000 8.00000
#>
#> $factor[[2]]
#> [1] 90.0 0.1 1.0
#>
#> $factor[[3]]
#> [1] NA
#>
#>
#> $numeric
#> [1] 1 -500 NA
#>
#> $logical
#> [1] 1 0 NA
#>