X = step(H)
X = step(H) reads data, X, from a variable stored in a MAT-file. The variable is assumed to be N-dimensional and a MATLAB built-in datatype. If the FrameBasedProcessing property is true, the data is read into MATLAB by reading along the first dimension. If FrameBasedProcessing is false, the data is read into MATLAB along the last dimension.
Note: The object performs an initialization the first time the step method is executed. This initialization locks nontunable properties and input specifications, such as dimensions, complexity, and data type of the input data. If you change a nontunable property or an input specification, the System object™ issues an error. To change nontunable properties or inputs, you must first call the release method to unlock the object.