Data Acquisition Toolbox

UserData

Store data that you want to associate with a device object

Description

UserData stores data that you want to associate with the device object.

Characteristics

Usage	AI, AO, DIO, Common
Access	Read/write
Data type	Any type
Read-only when running	No

Values

The default value is an empty vector.

Example

Create the analog input object ai and add two channels to it.

ai = analoginput('nidaq',1);
addchannel(ai,0:1);

Suppose you want to access filter coefficients during the acquisition. You can create a structure to store these coefficients, which can then be stored in UserData.

coeff.a = 1.0;
coeff.b = -1.25;
set(ai,'UserData',coeff)

UnitsRange

Device-Specific Property Reference