Pick

Usage

• Pick[list, sel] picks out those elements of list for which the corresponding element of sel is True.
• Pick[list, sel, patt] picks out those elements of list for which the corresponding element of sel matches patt.

Notes

• Example: Pick[

a, b, c

1, 0, 1

, 1]

• sel can be a nested list of any depth.

• Pick[list, sel, patt] picks out those list[[

, ... ]] for which sel[[

, ... ]] matches patt.

• Depending on the arrangement of elements matching patt in a nested list sel, Pick may return a ragged array.

• The heads in list and sel do not have to be List.

• Pick works with SparseArray objects.

• See Section 2.4.1.

• See also: Cases, Part, Position, Boole, ListConvolve.

• New in Version 5.1.

Further Examples