Stirling2nd {ClusterStability} | R Documentation |
This function returns the estimated Stirling numbers of the second kind i.e., the number of ways of partitioning a set of n objects into k nonempty groups.
Stirling2nd(n,k)
n |
number of objects. |
k |
number of groups (i.e. classes). |
The Stirling number of the 2nd kind for n elements and k groups or NaN (if the Stirling number for those n and k is greater than 1e300).
Stirling2nd(n=3,k=2)
# Expected value=3
Stirling2nd(n=300,k=20)
# Expected value=NaN