how to import variables in my workspace into system identification toolbox

the dryer2 example works fine. I created my variables u3 and y3, both have 1000 elements. I was trying to import my data instead u2 y2 for the example, then I got the following error message, which I don't think pertain to my case since I have one and only one output and input in the workspace.

The output variabe cannot be evaluated. Check if the varialbe exists in the workspace and, in the multi-output case, that the different outputs have the same number of rows.

Any help will be highly appreciated,

Richard

Answer 1

[Rajiv Singh]

This hsppens when the expressions you entered for input snd output variables cannot be successfully evaluated in the base workspace. What do you get if you type the same expression(s) in MATLAB command window and hit Enter?