rmprop - Remove custom properties from table or timetable - MATLAB (original) (raw)
Main Content
Remove custom properties from table or timetable
Syntax
Description
T = rmprop([T](#mw%5F6a90c8a2-61fd-4f68-8696-ddc53078b129),[propertyNames](#mw%5F1408c13c-df4e-40c1-9ad9-792946a60d1a)) removes properties that contain custom metadata from the table or timetableT. The input argument propertyNames specifies the names of the properties.
Examples
Add properties that contain custom metadata to a table. Then remove some of the properties.
First, read measurements of humidity and air quality into a table. Display the first three rows.
T = readtable('indoors.csv'); head(T,3)
Time Humidity AirQuality
___________________ ________ __________
2015-11-15 00:00:24 36 80
2015-11-15 01:13:35 36 80
2015-11-15 02:26:47 37 79 Add properties for custom metadata using the addprop function. Then assign metadata to those properties.
T = addprop(T,{'Instrument','Precision','SourceFile'},{'variable','variable','table'}); T.Properties.CustomProperties.Instrument = ["clock" "hygrometer" "air quality meter"]; T.Properties.CustomProperties.Precision = [NaN 0.5 0.1]; T.Properties
ans = TableProperties with properties:
Description: ''
UserData: []
DimensionNames: {'Row' 'Variables'}
VariableNames: {'Time' 'Humidity' 'AirQuality'}
VariableTypes: ["datetime" "double" "double"]
VariableDescriptions: {}
VariableUnits: {}
VariableContinuity: []
RowNames: {}Custom Properties (access using t.Properties.CustomProperties.): SourceFile: [] Instrument: ["clock" "hygrometer" "air quality meter"] Precision: [NaN 0.5000 0.1000]
To remove properties, use the rmprop function. The only properties that you can remove are the custom properties that you previously added using addprop. You cannot remove the other properties in T.Properties, although you can delete the values they contain.
Remove the Instrument and SourceFile properties from T.Properties.CustomProperties.
T = rmprop(T,{'Instrument','SourceFile'}); T.Properties
ans = TableProperties with properties:
Description: ''
UserData: []
DimensionNames: {'Row' 'Variables'}
VariableNames: {'Time' 'Humidity' 'AirQuality'}
VariableTypes: ["datetime" "double" "double"]
VariableDescriptions: {}
VariableUnits: {}
VariableContinuity: []
RowNames: {}Custom Properties (access using t.Properties.CustomProperties.): Precision: [NaN 0.5000 0.1000]
Input Arguments
Input table, specified as a table or timetable.
Names of the custom properties, specified as a string array, character vector, cell array of character vectors, or pattern scalar.
Extended Capabilities
Thermprop function fully supports tall arrays. For more information, see Tall Arrays.
Version History
Introduced in R2018b