MATLAB: Build a output.dimension since inputport.data

outputsimulink

I have a s-function that it must to build the dimension of outputport with the data of inputport.

Example:

if the inputport receive 3 ( inputport(1).Data==3 ) then the dimension of outputport will be 8 x 3 ( outputport(1).Dimension=[ 8 3] ).

I don`t know if it`s posible????…

i don`t know how ???

Please helpme………….thank you

Best Answer

As long as the number of dimensions of your output do not change, and you are able to determine the largest size for each dimension, you should be able to do this using variable-size signals. The Level-2 MATLAB S-function demo described on this page actually does what you described.

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MATLAB: Difference between ssGetInputPortRealSignal and ssGetInputPortRealSignalPtrs

You are correct that "ssGetInputPortRealSignals requires time contiguous signals which can be initialzed with the macro ssSetInputPortRequiredContiguous."

ssGetInputPortRealSignalPtrs is used for signals that can be non-contiguous. Examples of a non-contiguous signal are a bus signal or a signal that is a result of MUX-ing together signals from multiple sources, and possible other types of composite signals (I'm not sure if all composite signals are non-contiguous).

MATLAB: How to create custom integral blocks

See the following example that uses an S-function to implement a continuous limited integrator where the output is bounded by lower and upper bounds and includes initial conditions. You can access the model example using the following command:

>> open_system('msfcndemo_limintm');

And you can look at the internals of the S-function using the following command:

>> edit('msfcn_limintm.m');

You can easily edit the number of input-ports and output-ports of the S-function. Some helpful links are below:

https://www.mathworks.com/help/releases/R2020a/simulink/sfg/s-function-examples.html#bq9pj0l

https://www.mathworks.com/help/releases/R2020a/simulink/create-matlab-s-functions.html

Best Answer

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MATLAB: Difference between ssGetInputPortRealSignal and ssGetInputPortRealSignalPtrs