Map Containers
Store data values in a Map
object, which is a data structure that associates each value with a corresponding key. A Map
object is similar to a dictionary or associative array in that you can use keys to retrieve values from it. Keys can be numbers or text, providing more flexibility for data access than array indices.
Funktionen
containers.Map | Object that maps unique keys to values |
isKey | Determine if Map object contains key |
keys | Return keys of Map object |
remove | Delete key-value pairs from Map object |
values | Return values of Map object |
Themen
- Overview of Map Data Structure
A Map is a type of fast key lookup data structure that offers a flexible means of indexing into its individual elements. The indices for a Map can be nearly any scalar numeric value or a character vector.
- Description of Map Class
A Map is an object, or instance, of the
containers.Map
class. - Create Map Object
Create a Map using the
containers.Map
class. - Examine Contents of Map
This example shows how to find all the keys and values in a Map.
- Read and Write Using Key Index
This example shows how to read from a Map structure and how to add new key/value pairs.
- Modify Keys and Values in Map
This example shows how to remove and modify keys and values in a Map structure.
- Map to Different Value Types
This example shows how to store structures or cell arrays in a Map structure.