Advanced Scripts

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Advanced Scripts

Now that we have seen the core functions of a script we will run and check some more advanced scripts.

1.	Open 20-sim.

2.	Open Octave (or Matlab).

3.	In Octave/Matlab, change the local working directory to the tutorial folder inside your scripting working folder. E.g . type:

cd 'C:\Users\yourusername\Documents\20simscripting\Octave\tutorials'

Set Parameter Values

4.	In Octave/Matlab, execute the following script (e.g. type the command followed by ENTER):

SetParameterAndRun

This script will open the model ControlledSystem.emx and run a simulation. Then a model parameter is changed and a second simulation run is performed. As explained in the previous topic, you can inspect the script in a text editor.

Compared to the basic script you will find a new function:

•	xxsimSetParameters: This function is used to set the parameter in the model with the new value.

Multiple Runs

5.	In Octave/Matlab, execute the following script (e.g. type the command followed by ENTER):

multipleRun

This script will open the model ControlledSystem.emx and run a simulation multiple times while changing a parameter. Then a model parameter is changed and a second simulation run is performed.

Read Parameter Values

6.	In Octave/Matlab, execute the following script (e.g. type the command followed by ENTER):

readAndSetParameters

This script will open the model ControlledSystem.emx and run a simulation. Then a model parameter is read from file and changed accordingly in the model, followed by a second simulation run.

You will find these new functions:

•	addpath: An additional path is given (../library/xxlib) to allow addtional (user defined) functions.

•	xxlibReadCsv: This function is used to read a parameter name and value from a spreadsheet file.

Store Simulation Results

7.	In Octave/Matlab, execute the following script (e.g. type the command followed by ENTER):

modelVerification

This script will open the model ControlledSystem.emx and run a simulation. After the run the simulation results are stored and plotted in Octave/Matlab. You will find these new functions:

•	xxsimSetLogVariables: Define which variables are going to be logged during the simulation run.

•	xxsimGetLogVariables: Export the logged variables after the simulation run to Octave/Matlab.

Examples

8.	In Octave/Matlab, change the local working directory to the tutorial folder. E.g. type:

cd 'C:\Users\yourusername\Documents\20simscripting\examples'

here you can find more example scripts.