Remove device objects from MATLAB workspace
clear obj clear obj.Channel(index) clear obj.Line(index)
Note: You cannot use the legacy interface on 64–bit MATLAB®. See Session-Based Interface to acquire and generate data.
A device object or array of device objects.
One or more channels contained by obj.
One or more lines contained by obj.
Create the analog input object ai, copy ai to a new variable aicopy, and then clear the original device object from the MATLAB workspace.
ai = analoginput('winsound'); ch = addchannel(ai,1:2); aicopy = ai; clear ai
Retrieve ai from the engine with daqfind, and show you that ai is identical to aicopy.
ainew = daqfind; isequal(aicopy,ainew) ans = 1
Clearing device objects, channels, and lines follows these rules:
clear does not remove device objects, channels, or lines from the data acquisition engine. Use the delete function for this purpose.
If multiple references to a device object exist in the workspace, clearing one reference will not invalidate the remaining references.
You can restore cleared device objects to the MATLAB workspace with the daqfind function.
If you use the help command to display the file help for clear, then you must supply the pathname shown below.