getappdata

Retrieve application data

Syntax

val = getappdata(obj,name)

vals = getappdata(obj)

Description

Use this function to retrieve data stored using the setappdata function. Both of these functions provide a convenient way to share data between callbacks or between separate UIs.

val = getappdata(obj,name) returns a value stored in the graphics object, obj. The name identifier, name, uniquely identifies the value to retrieve.

vals = getappdata(obj) returns all values stored in the graphics object with their name identifiers.

Examples

Store and Retrieve Date and Time

Create a figure window.

f = figure;

Get the current date and time as separate variables.

dt = fix(clock);
currdate = dt(1:3);
currtime = dt(4:6);

Store currdate and currtime using the setappdata function.

setappdata(f,'todaysdate',currdate);
setappdata(f,'presenttime',currtime);

Retrieve the date information.

getappdata(f,'todaysdate')

ans =

    2014  12    23

Retrieve all data associated with figure f.

getappdata(f)

ans = 

     todaysdate: [2014 12 23]
    presenttime: [16 51 5]

Input Arguments

obj — Graphics object containing the value

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

Graphics object containing the value, specified as any graphics object. This is the same graphics object passed to setappdata during the storage operation.

name — Name identifier

character vector | string scalar

Name identifier, specified as a character vector or string scalar. This is the same name identifier passed to setappdata during the storage operation.

Output Arguments

val — Stored value

any MATLAB^® data type

Stored value, returned as the same value and data type that was originally stored.

vals — All values stored in the graphics object with name identifiers

structure

All values stored in the graphics object with name identifiers, returned as a structure. Each field in the structure corresponds to a stored value. The field names of the structure correspond to the name identifiers assigned when each value was stored.