aes_string: Generate aesthetic mappings from a string
Description
Aesthetic mappings describe how variables in the data are
mapped to visual properties (aesthetics) of geoms.
Compared to aes this function operates on strings rather
than expressions.
Usage
aes_string(...)
Arguments
...
List of name value pairs
Details
aes_string is particularly useful when writing
functions that create plots because you can use strings
to define the aesthetic mappings, rather than having to
mess around with expressions.