function numberOfRealZerosAndPoles_zp
import Modelica_LinearSystems2.DataDir;
input String fileName = DataDir + "/zp.mat" "Name of the zeros and poles data file" annotation(
Dialog(loadSelector(filter = "MAT files (*.mat);; All files (*.*)", caption = "state space system data file")));
input Real eps = Modelica.Constants.eps;
output Integer n1n2d1d2[4];
end numberOfRealZerosAndPoles_zp;