| subsetOrder | R Documentation | 
A wrapper for is.subset which returns set inclusions.
subsetOrder(x, y)
| x | A vector. | 
| y | A vector of the same type as  | 
If x is a subset of y, returns -1, for the reverse
returns 1.  If sets are equal or incomparable, it returns 0.
A single integer, 0, -1 or 1.
Robin Evans
is.subset, inclusionMax.
subsetOrder(2:4, 1:4)
subsetOrder(2:4, 3:5)
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