Either an object of class kRp.tagged-class,
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.
db1
A numeric vector with named magic numbers,
defining the relevant parameters for the first formula (regression).
db2
A numeric vector with named magic numbers,
defining the relevant parameters for the second formula (cloze equivalent).
...
Further valid options for the main function,
see readability for details.
Calculates the two Danielson-Bryan formulas. In contrast to
readability,
which by default calculates all possible indices,
this function will only calculate the index value.