Matlab Set Operations

Set Operations

MATLAB has no dedicated set data type—a “set” here is just a Matlab Array whose elements may be of any data type.

Functions

MATLAB also has no operators for set operations; they are realized through plain functions.

Functions	Description
intersect	Set intersection of two arrays
ismember	Array elements that are members of set array
setdiff	Set difference of two arrays
setxor	Set exclusive OR of two arrays
union	Set union of two arrays
unique	Unique values in array
ismembertol	Members of set within tolerance
uniquetol	Unique values within tolerance
join	Combine two tables or timetables by rows using key variables
innerjoin	Inner join between two tables or timetables
outerjoin	Outer join between two tables or timetables

Tolerance

• A common pitfall in MATLAB is that floating-point precision rarely lets two values be exactly equal; the ...tol functions accept a permitted error
• Default tolerances are
  • For single: 1e-6
  • For double: 1e-12