Not have enough information to determine output sizes

Dear all,

My Problem:

Simulink does not have enough information to determine output sizes for
this block. If you think the errors below are inaccurate, try specifying
types for the block inputs and/or sizes for the block outputs.

The idea:

I have an Input Parameter with two Information 1x2 Matrix using only the second Information in this example, but it does not work.

My Simulink realisation with Threashold (Switch1 = 80) and InitialCondition (Memory2 = 50):

The MATLAB Function contains:

function y = fcn(u)

persistent y_
if isempty(y_)
   y_ = 50;
end

y = y_ + u(2,1) - 20;
y_ = y;

My question:

How can I handle this problem? Why is the output of my MATLAB Function and Memory2 not defined as "1"? Can I define the output variable to fix this problem?

Answer 1

[Kaustubha Govind]

I think it is the loop in your model that is confusing Simulink propagation. You may want to insert a Signal Specification block right before the MATLAB Function block, and specify the signal dimensions.

[Michael]

Thank you very much :)

Answer 2

[Azzi Abdelmalek]

In your function you are using the second element of u, remove the mux block, and just connect the switch output to your function.

[Michael]

Hi,

I have already done this and this would work well, but... in the "complete" function I am using the first Input of the mux block to generate the output (y). Is there a different possibility?

Best regards, Michael

[Azzi Abdelmalek]

Look at Kaustubha's answer

Answer 3

[omar sheishaa]

i have a problem while depolying the below model on android device "Simulink cannot determine sizes and/or types of the outputs for block 'slexHARAndroidExample/predictActivity' due to errors in the block body, or limitations of the underlying analysis. The errors might be inaccurate. Fix the indicated errors, or explicitly specify sizes and/or types for all block outputs." although it worked before

my model is as below

also below is the code of the "predictactivity" block

function y = predictActivity(u)%#codegen

% predictActivity - predict human activity based on trained model stored in

% EnsembleModelAndroid.mat file.

% Copyright 2017 The MathWorks, Inc.

persistent mdl;

if isempty(mdl)

mdl = loadCompactModel('EnsembleModel.mat');

end

y = predict(mdl,u);

end