as_numeric_ecotox {ECOTOXr} | R Documentation |
Values represented by ECOTOX character
to numeric
Description
Similar to
as.numeric()
, but it also
performs some text sanitising before coercing text to numerics.
Usage
as_numeric_ecotox(x, range_fun = NULL, ..., warn = TRUE)
Arguments
x |
A vector of |
range_fun |
Function to summarise range values. If |
... |
Arguments passed to |
warn |
If set to |
Details
The following steps are performed to sanitise text before coercing it to numerics:
Notes labelled with
"x"
or"\*"
are removed.Operators (
">"
,">="
,"<"
,"<="
,"~"
,"="
,"ca"
,"er"
) are removed.Text between brackets (
"()"
) is removed (including the brackets)Comma's are considered to be a thousand separator when they are located at any fourth character (from the right) and removed. Comma's at any other location is assumed to be a decimal separator and is replaced by a period.
If there is a hyphen present (not preceded by an "
"e"
or"E"
) it is probably representing a range of values. Whenrange_fun
isNULL
it will result in aNA
. Otherwise, the numbers are split at the hyphen and aggregated withrange_fun
It is your own responsibility to check if the sanitising steps are appropriate for your analyses.
Value
A vector of numeric
values with the same length as x
.
Author(s)
Pepijn de Vries
See Also
Other ecotox-sanitisers:
as_date_ecotox()
,
as_unit_ecotox()
,
mixed_to_single_unit()
,
process_ecotox_dates()
,
process_ecotox_numerics()
,
process_ecotox_units()
Examples
## a vector of commonly used notations in the database to represent
## numeric values
char_num <- c("10", " 2", "3 ", "~5", "9.2*", "2,33",
"2,333", "2.1(1.0 - 3.2)", "1-5", "1e-3")
## Text fields reported as ranges are returned as `NA`:
as_numeric_ecotox(char_num, warn = FALSE)
## Text fields reported as ranges are processed with `range_fun`
as_numeric_ecotox(char_num, range_fun = median)