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.
TB1
A numeric vector with named magic numbers for the first of the formulas.
TB2
A numeric vector with named magic numbers for the second of the formulas.
...
Further valid options for the main function,
see readability for details.
This function calculates the two formulae by Tr\"ankle-Bailer,
which are based on the Dickes-Steiwer formulae.
In contrast to readability,
which by default calculates all possible indices,
this function will only calculate the index values.