Coerce a character string to the same type as a target value
Create a new value from a character string based on an old value, e.g., if
the old value is an integer, call as.integer() to coerce the string to
an integer.
coerceValue(val, old)
val |
A character string. |
old |
An old value, whose type is the target type of |
This function only works with integer, double, date, time (POSIXlt or
POSIXct), and factor values. The date must be of the format
%Y-%m-%dT%H:%M:%SZ. The factor value must be in the levels of
old, otherwise it will be coerced to NA.
A value of the same data type as old if possible.
library(DT)
coerceValue("100", 1L)
coerceValue("1.23", 3.1416)
coerceValue("2018-02-14", Sys.Date())
coerceValue("2018-02-14T22:18:52Z", Sys.time())
coerceValue("setosa", iris$Species)
coerceValue("setosa2", iris$Species) # NA
coerceValue("FALSE", TRUE) # not supportedPlease choose more modern alternatives, such as Google Chrome or Mozilla Firefox.