textspec Values Based on String PrefixesReturn a vector of textspec values based on special prefixes in
strings of x. This is an internal utility function, not intended
to be called by package users.
spec_from_text(x)Character vector with the same length as x, containing
textspec values. Values are determined by looking for special
prefixes in the text strings.
Character vector.
Currently supported textspec values and the associated prefixes
are: "plain" (no recognized prefix); "plotmath" (prefix MATH_); and
"markdown" (prefix MKDN_).
The returned value will be "plain" for elements of x that are NA.
prefix_text to add or remove special prefixes to text
strings based on textspec.