Query number of dimensions of dynamic system model or model array
n = ndims(sys)
n = ndims(sys) is the
number of dimensions of a dynamic system model or a model array
A single model has two dimensions (one for outputs, and one for inputs).
A model array has 2 + p dimensions, where p ≥
2 is the number of array dimensions. For example, a 2-by-3-by-4 array
of models has 2 + 3 = 5 dimensions.
ndims(sys) = length(size(sys))
sys = rss(3,1,1,3); ndims(sys) ans = 4
4 for this
3-by-1 array of SISO models.