clm_vol - compute volatile nodes from a set of clusterings

clmvol is not in actual fact a program. This manual page documents the behaviour
and options of the clm program when invoked in mode

*vol*. The options

**-h**,

**--apropos**,

**--version**,

**-set**,

**--nop** are
accessible in all

**clm** modes. They are described in the

**clm**
manual page.

**clm vol** **[-fraction** num (

*nff factor*)

**]** **[-o**
fname (

*output file*)

**]** <cl file>+

**clm vol** computes a score for each node, which at a minimum is equal to
one. The output is in the form of a matrix containing a single column. The
score correlates with what is deemed to be volatile behaviour. For all pairs
of clusterings the set of all intersections is computed, and these are
considered in turn. An intersection is deemed to be volatile if the size of
the intersection is less than half the size of the smallest of the two
clusters. In that case, for each node in the intersection its volatility score
is incremented by one over the size of the intersection. The size comparison
can be made more stringent by increasing the

**-fraction** *<frac>* option, which is by default set to
0.5. Volatility occurs if the size of the intersection is less than

**<frac>** times the size of the smallest cluster. If the

**-fraction** value is increased all the way up to 1.0, the implication is
that an intersection is considered volatile unless one of the two clusteres
considered is a subset of the other.

Stijn van Dongen.

**-fraction** num (

*nff factor*)

See the discussion at

**DESCRIPTION**.

**-o** fname (

*output file*)

**mclfamily(7)** for an overview of all the documentation and the utilities
in the mcl family.