explodecols
Usage:
explodecols <colid-list>
Takes a list of specified columns which represent N-element
arrays and replaces each one with N scalar columns.
Each of the columns specified by <colid-list>
must have a fixed-length array type,
though not all the arrays need to have the same number
of elements.
This filter does the opposite of
collapsecols
.
Syntax for the <colid-list>
argument is described in Section 6.3.