Returns the centers of the intervals based on 1D points in \(x\) parameterized by \(c \in (0,1)\)
so that \(100c\) % of the length of interval is to the left of \(M_c\) and \(100(1-c)\) % of the length of the interval
is to the right of \(M_c\). That is, for an interval \((a,b)\), the parameterized center is \(M_c=a+c(b-a)\)
x
is a vector
of 1D points, not necessarily sorted.
See also (ceyhan:metrika-2012,ceyhan:revstat-2016;textualpcds).