what is the format of yfinal in stepinfo function?

What is the correct format for yfinal in the stepinfo function given that y and t are 1 dimension vector output from simulink? stepinfo throws me the exception: "The input arguments "Y" and "YFINAL" of the "stepinfo" and "lsiminfo" command must have compatible sizes." I am unable to figure out what is the problem. The yfinal I am using is a step function generated by the simulink function generator.

Answer 1

[Kiran]

I hope following explanation would make it clear.

" For SISO responses, t and y are vectors with the same length NS. For systems with NU inputs and NY outputs, you can specify y as an NS-by-NY-by-NU array (see step) and yfinal as an NY-by-NU array. stepinfo then returns a NY-by-NU structure array S of performance metrics for each I/O pair."

Documentation link:

http://www.mathworks.com/help/control/ref/stepinfo.html