currency: Get the currencies of numbers within a string.
Description
The currency of a number is defined as the character coming before the number
in the string. If nothing comes before (i.e. if the number is the first thing
in the string), the currency is the empty string, similarly the currency can
be a space, comma or any manner of thing.
get_currency
takes a string and returns the currency of the first number therein. It is
vectorized over string.
get_currencies takes a string and returns
the currencies of all of the numbers within that string. It is not
vectorized.
Usage
get_currencies(string)
get_currency(strings)
Arguments
string
A string.
strings
A character vector.
Value
get_currency returns a character vector.
get_currencies returns a data frame with one column for the
currency symbol and one for the amount.
Details
These functions do not allow for leading decimal points.