RussellRaoDissimilarity[u, v] gives the Russell\[Dash]Rao dissimilarity between Boolean vectors u and v.
SeedRandom[n] resets the pseudorandom generator, using n as a seed. SeedRandom[] resets the generator, using as a seed the time of day and certain attributes of the current ...
SetAttributes[s, attr] adds attr to the list of attributes of the symbol s.
SetOptions[s, name_1 -> value_1, name_2 -> value_2, ...] sets the specified default options for a symbol s. SetOptions[stream, ...] or SetOptions["name", ...] sets options ...
Sin
(Built-in Mathematica Symbol) Sin[z] gives the sine of z.
SokalSneathDissimilarity[u, v] gives the Sokal\[Dash]Sneath dissimilarity between Boolean vectors u and v.
StirlingS1[n, m] gives the Stirling number of the first kind S_n^(m).
TimeConstrained[expr, t] evaluates expr, stopping after t seconds. TimeConstrained[expr, t, failexpr] returns failexpr if the time constraint is not met.
Tolerance is an option for various numerical options which specifies the tolerance that should be allowed in computing results.
VertexCoordinateRules is an option for GraphPlot and related functions which specifies rules for determining the coordinates at which vertices should be placed.