a user-specified collection of files, variables and cases in the data set
The set A is a subset of set B iff every member of A is also a member of B.
if all members of a set X are also members of set Y, then X is said to be a subset of Y
Any set made up of the members of a parent set.
A small set contained in a larger set.
A set all of whose elements are elements in a larger set.
A set that forms one part of a larger set. Example: A subset of a baseball team is the pitching roster.
set, all of whose elements are also elements of the other set
A set in which each element is also an element of another specified set. Contrast with superset.
A subset of a given set is a collection of things that belong to the original set. For example, A={a,b} could include, a, b, a and b, or the null set (neither).
A set consisting of elements from a given set (e.g., if B = {1,2,3,4,5,6,7} and A = {1,2,3}, then A is a subset of B, written A 'sideways U with line underneath' B).
In mathematics, especially in set theory, the terms, subset, superset and proper (or strict) subset or superset are used to describe the relation, called inclusion, of one set being contained inside another set. Informally, every element belonging to subset A also belongs to superset B, but there may be elements belonging to B that do not belong to A (see diagram to right).