This function calculates the number of paired comparisons needed to compare a
set of N items.
Usage
count.combn(nitem)
Value
An integer corresponding to the number of paired comparisons.
Arguments
nitem
Number of items.
Details
This function is only useful, if the number of paired comparisons of a full
design, that is all possible paired comparisons, is of interest. Then the
number is
$$\frac{N\times(N-1)}{2}$$