remove
Delete key-value pairs from Map
object
Syntax
Description
Examples
Remove Key-Value Pair
Create a Map
object. Display its keys and values.
ids = [437 1089 2362]; names = {'Li, N.','Jones, R.','Sanchez, C.'}; M = containers.Map(ids,names)
M = Map with properties: Count: 3 KeyType: double ValueType: char
keys(M)
ans=1×3 cell array
{[437]} {[1089]} {[2362]}
values(M)
ans = 1x3 cell
{'Li, N.'} {'Jones, R.'} {'Sanchez, C.'}
Remove a key-value pair. Display the updated keys and values.
remove(M,2362); keys(M)
ans=1×2 cell array
{[437]} {[1089]}
values(M)
ans = 1x2 cell
{'Li, N.'} {'Jones, R.'}
Remove Multiple Key-Value Pairs
Create a Map
object.
months = {'Jan','Feb','Mar','Apr'}; rainfall = [327.2 368.2 197.6 178.4]; M = containers.Map(months,rainfall); keys(M)
ans = 1x4 cell
{'Apr'} {'Feb'} {'Jan'} {'Mar'}
values(M)
ans=1×4 cell array
{[178.4000]} {[368.2000]} {[327.2000]} {[197.6000]}
To remove multiple key-value pairs, specify the keys as a cell array.
keySet = {'Feb','Mar','Apr'}; remove(M,keySet); keys(M)
ans = 1x1 cell array
{'Jan'}
values(M)
ans = 1x1 cell array
{[327.2000]}
Input Arguments
M
— Input Map
object
Map
object
Input Map
object.
keySet
— Keys of key-value pairs to remove
numeric scalar | character vector | string scalar | cell array
Keys of the key-value pairs to remove from the Map
object, specified as a numeric scalar, character vector, string scalar, or
cell array. To remove multiple key-value pairs, specify
keySet
as a cell array—even when you specify the keys
as numeric scalars or strings.
Version History
Introduced in R2008b
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