keys

Return keys of Map object

Syntax

keySet = keys(M)

Description

Note

dictionary is recommended over containers.Map because it accepts more data types as keys and values and provides better performance. (since R2022b)

keySet = keys(M) returns a cell array containing all the keys in the input Map object.

Examples

Keys of Map

Create a Map object.

months = {'Jan','Feb','Mar','Apr'};
rainfall = [327.2 368.2 197.6 178.4];
M = containers.Map(months,rainfall)

M = 
  Map with properties:

        Count: 4
      KeyType: char
    ValueType: double

Return a cell array containing its keys.

keySet = keys(M)

keySet = 1x4 cell
    {'Apr'}    {'Feb'}    {'Jan'}    {'Mar'}

Input Arguments

M — Input Map object

Map object

Input Map object.

Version History

Introduced in R2008b