Capture a sequence of logical statements and append
them into a single expression.
Usage
makeCriteria(...)
Value
A string which appends all expressions together.
Arguments
...
an arbitrary number of expressions which evaluate to
logicals
Author
Chris Salahub
Details
This function, along with `stopper` dictates the stop
behaviour of recursive binning. It accepts an arbitrary number
of arguments, each a logical statement, and appends them all into
a string separated by the pipe character.