Conversion is a key element in SCOM composing. Vectors can become integers, integers can become symbols, and so on. The cfunction provides a welcome short-cut to some of these conversion processes.
Here, a variable called prime is a list of prime numbers between 1 and 18. This becomes a reference sequence for a conversion process, from 24 vectors generated via the function gen-noise-white, to a sequence of prime numbers between 1 and 18 that have been substituted in an appropriate quantitive sequence.
The conversion and substitution process may also extend to symbols within a reference sequence.