.Modelica_LinearSystems2.Utilities.Streams.readMatrixA2

Information

Syntax

A = Streams.readMatrixA2(fileName, matrixName, nx);

Description

Opens the given MATLAB MAT file and returns the submatrix A of the matrix matrixName given as

A[nx, nx] = matrixName[1:nx, 1:nx];

Example

// Generate dslin.mat of the double pendulum example first
Modelica_LinearSystems2.Utilities.Import.linearize(
  "Modelica_LinearSystems2.Utilities.Plants.DoublePendulum", 1.0);

// Read A matrix of the linearized system
readMatrixA2("dslin.mat", "ABCD", 6)
//  = 
// [0.0, 1.0000000001008236, 0.0, 0.0, 0.0, 0.0;
// 0.0, 0.0, -2.6206364377231033, 1.2573088155408514, -0.779772901933996, 0.1247427420611989;
// 0.0, 0.0, 0.0, 1.000000000091112, 0.0, 0.0;
// 0.0, 0.0, -0.19138983233984724, 3.539452887205103, -3.1119345375319445, 1.6015423818240417;
// 0.0, 0.0, 0.0, 0.0, 0.0, 1.000000000038966;
// 0.0, 0.0, -7.229008278422499, 1.3904525205542553, 3.4263760991964918, -1.0645822524481547]

Interface

function readMatrixA2
  extends Modelica.Icons.Function;
  input String fileName = DataDir + "abcd.mat" annotation(
    Dialog(loadSelector(filter = "MAT files (*.mat);; All files (*.*)", caption = "state space system data file")));
  input String matrixName = "ABCD" "Name of the generalized state space system matrix";
  input Integer nx "System order";
  output Real A[nx, nx] = ABCD[1:nx, 1:nx];
end readMatrixA2;