] removes all elements of expr which match pattern.
] removes all parts of expr on levels specified by levspec which match pattern.
1, a, 2, b
With the option Heads
True, you can delete heads with DeleteCases. Deleting the head of a particular element in an expression is equivalent to applying FlattenAt to the expression at that point.
1, f[2, 3], 4
, Heads -> True].
Level specifications are described in Section A.3.6.
See the Mathematica book: Section 2.3.2.
See also: Cases, ReplaceAll, Delete.
This deletes all elements of the list that are real numbers.
This command deletes all integers from levels 1 to 2.
In contrast this command deletes all integers only at level 2.
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