setappdata

Store application data

Syntax

setappdata(obj,name,val)

Description

Use this function to store data in a UI. You can retrieve the data elsewhere in your code using the getappdata function. Both of these functions provide a convenient way to share data between callbacks or between separate UIs.

setappdata(obj,name,val) stores the contents of val. The graphics object, obj, and the name identifier, name, uniquely identify the data for later retrieval.

Examples

Store and Retrieve Date Information

Create a figure window. Then, get the current time using the date function.

f = figure;
val = date

val =

23-Dec-2014

Store the contents of val using the setappdata function. In this case, val is stored in the figure object using the name identifier, 'todaysdate'.

setappdata(f,'todaysdate',val);

Retrieve the data and display it.

getappdata(f,'todaysdate')

ans =

23-Dec-2014

Input Arguments

obj — Graphics object in which to store the value

Figure object | Panel object | ButtonGroup object | UIControl object | ...

Graphics object in which to store the value, specified as any graphics object. The graphics object must be accessible from within the functions you plan to store and retrieve the data.

name — Name identifier

character vector | string scalar

Name identifier, specified as a character vector or string scalar. Select a unique name identifier that is easy to remember so that you can easily recall it when you want to retrieve the data.

Example: setappdata(h,'mydata',5) stores the value 5 using the name 'mydata'.

val — Value to store

any MATLAB^® data type

Value to store, specified as any MATLAB data type.