This is just a convenient wrapper function for readability.
Usage
DRP(txt.file, word.list, ...)
Arguments
txt.file
Either an object of class kRp.text,
a character vector which must be be
a valid path to a file containing the text to be analyzed,
or a list of text features. If the latter, calculation
is done by readability.num.
word.list
A vector or matrix (with exactly one column) which defines familiar words. For valid results
the long Dale-Chall list with 3000 words should be used.
...
Further valid options for the main function,
see readability for details.
Calculates the Degrees of Reading Power,
using the Bormuth Mean Cloze Score. In contrast to
readability,
which by default calculates all possible indices,
this function will only calculate the index value.