I have a problem with Simulink, I created Simulink model, and to make it more understandable I want to use In and Out blocks and connect them with scope, but that doesn't work properly. Values don't go through this operation and scope is empty.
Values in whole model are good, on other connected scope everything works fine.
Inport are used to get external data into a model. Outport are used to pass data generated by the model out externally (i.e. back into MATLAB).
If you have an Inport, and you don't set up data to be passed into your model, then the signal attached to the Inport will be zero. It sounds as if this is what you have done.
From your description it sounds as if you are wanting the GoTo and From blocks.
Related
In:
https://docs.omnetpp.org/tutorials/tictoc/part5/
and
https://doc.omnetpp.org/omnetpp/manual/#sec:simple-modules:declaring-statistics
it's shown how network statistics can be processed after a simulation.
Is it possible to get network parameters dynamically?
TL;DR: Use signals (not statistics) and hook up your own simple module on these signals and compute the required statistics in that module.
You cannot access the value of #statistics in your code, and there is a reason for this as this would be an anti pattern. NED based statistics were introduced as a method to add calculations and measurements to your model without modifying your models behavior and code. This means that statistics are NOT considered part of a model, but rather they are considered as a configuration. Changing a statistics (i.e. deciding that you want to measure something else) should never change the behavior of your model. That's why the actual value of a given statistic is not exposed (easily) to the C++ code. You could dig them out, but it is highly discouraged.
Now, this does not mean that what you want to achieve is not legitimate but the actual statistics gathering must be an integral part of your model. I.e. you should not aim for using built-in statistics, but rather create an explicit statistics gathering submodule that should hook up on the necessary signals (https://doc.omnetpp.org/omnetpp/manual/#sec:simple-modules:subscribing-to-signals) and do the actual statistics computation you need in its C++ code. After that, other modules are free to access this information and make decisions based on that.
Short version
I am considering to use BusObjects to implement hard interface control on a (large industrial) application using Simulink and I would like to store the BusObjects (hundrends of them) into a Matlab structure so that the entire application interface specification is well organized. However, it seems that BusObjects cant be contained into structures, nor they can reside on other workspaces other than Matlab Base. Any idea on how to handle this?
Long version
I would like the interfaces specification to be hierarchical and centralized in some way. I mean, I would like to specify the external interface of my application, then the internal interfaces, then the internal interfaces of the internal interfaces and so on. And I would like this information to be stored in one object that resembles the hierarchy. I was thinking in using an structure with BusObjects as elements.
Unfortunately, it seems that, for a bus object to work, it must be declared on the Matlab workspace as an independent variable of class BusObject. It cant be an element of an structure that is a BusObject, or an element of a cell whose elements are BusObjects or an element of a BusObject vector.
Any suggestion on how to handle this? take into account that if you have a model with dozens and dozens of blocks and more than 3 hierarchy levels, then you end up with hundreds of bus objects in the Matlab workspace without any particular structure... I think that is too messy to let it be...
Bus objects are always stored in the global workspace.
Send a request to Mathworks if you want to change this.
I'd like to clear all application data from a single figure, without using the names of individual application data variables.
Is there any function in MATLAB that will do the above?
No, you can't do this in a simple way.
The application data for a figure is used to store lots of things by MATLAB itself (such as the zoom and pan status of the figure), not just things that you set yourself - so just "removing" it all is a bad idea.
You can get the full set of application data using getappdata(f), where f is the handle to the figure (as opposed to the more usual getappdata(f, 'varname'), which would get a specific variable that you'd stored in the application data).
The result is a structure, and you can than go through the field names and delete anything you've stored.
To make this easier, you can use a consistent prefix for the names of any variables you store. Then just go through the field names and call rmappdata for any field that starts with your prefix.
I am working in matlab simulink.There are two parts of my work.one is about control systems and the other is about image processing.I want to link them such that the control system part only receives a scalar input from image processing part.So i want to use the 'model' block attached to the image processing part such that there is a scalar input to the model block.How can I use this 'model' block such that it has an input port as I donot see any input port to this block.Please guide me.
The Model Block is used whenever you want to make use of a model inside of another model. This is something that is useful, for example, when multiple people are working on a large system that is comprised of multiple self-contained systems each of which could be its own model, but that could also act together in some useful way.
If you are just using Model Blocks for the sake of organizing subsystems together, then you should consider using Subsystems, instead. Subsystems allow you to group blocks together and do not require you to create separate models for each of your components (i.e. your Controller subsystem and your Image Processing subsystem). You can easily make a Subsystem either by dragging in the Subsystem block from the Simulink Library Browser, or by selecting components in your model, right-clicking, and selecting Create Subsystem from Selection.
However, if you actually do want to use Model Blocks, that can be done as follows. So, I'm assuming that you have already created two models -- one for your control system, the other for your image processing algorithm.
First, in each model, make sure you have specified the proper inputs/outputs. You will do this by adding Inport and Outport blocks to the top-level of each model.
Next, create a new model in which you will integrate the Control model and Image Processing model. Add a Model Block for each model (as you had already described doing). For each Model Block, open the Parameters dialog box. You will see a parameter where you can specify the model name. Enter the name of the model that you will be referencing (i.e. either the controller or image processing model). Additionally, you can browse for these models. Once you do that, the inputs and outputs that you had previously specified should now be visible on the Model Blocks.
I have a simulink car model which includes different part of a car obviously (subsystems):). I want to isolate a part of this model, for example, brakes, and feed in dummy variable as inputs.
My problem is that this model has few bus selector and creator, which makes it a little bit complicated. I wonder how I can isolate the brakes part without messing up the buses.
When you say isolate, do you mean you want to move the contents of the subsystem into a separate model? If so, one way to do this is to use the "Convert to Model block" tool. To use this,
Make sure the subsystem is atomic (set_param(subsys, 'TreatAsAtomicUnit','on');).
Right-click on the subsystem and choose Convert to Model block.
The tool might ask you to make a few changes to the model.
At the end of the process, you will have a new model with the contents of the subsystem, and the tool will create any bus objects that are needed.