zip-methods: Convert between parallel vectors and lists
Description
The zipup and zipdown functions convert between two
parallel vectors and a list of doublets (elements of length 2). The
metaphor, borrowed from Python's zip, is that of a zipper. The
zipup function interleaves the elements of the parallel vectors
into a list of doublets. The inverse operation is zipdown,
which returns a Pairs object.
Usage
zipup(x, y, ...)
zipdown(x, ...)
Arguments
x,y
For zipup, any vector-like object. For zipdown, a
doublet list.
...
Arguments passed to methods.
Value
For zipup, a list-like object, where every element is of length 2.
For zipdown, a Pairs object.