Input definition in "MATLAB System" block not necessary?

Looking at a MATLAB System block that I wrote a while ago, I noticed that I didn't properly specify the inputs. The code works but I don't remember why I did it this way or if it could create a problem at some point. The functions getInputDataTypeImpl, isInputComplexImpl and isInputFixedSizeImpl only have one element, instead of seven.

Does Matlab automatically copy the settings for the other six inputs?

function num = getNumInputsImpl(~) % Number of inputs
    num = 7;
end
function num = getNumOutputsImpl(~) % Number of outputs
    num = 8;
end
function [dt1, dt2, dt3, dt4, dt5, dt6, dt7, dt8] = getOutputDataTypeImpl(~) % Output data type
    dt1 = 'double';
    dt2 = 'double';
    dt3 = 'double';
    dt4 = 'double';
    dt5 = 'double';
    dt6 = 'double';
    dt7 = 'double';
    dt8 = 'double';
end
function dt1 = getInputDataTypeImpl(~) % Input data type
    dt1 = 'double';
end
function [sz1, sz2, sz3, sz4, sz5, sz6, sz7, sz8] = getOutputSizeImpl(obj) % Output dimensions
    sz1 = [1,        obj.nIn];     
    sz2 = [obj.N+1,  obj.nState];                
    sz3 = [obj.N,    obj.nOut];    
    sz4 = [obj.N,    obj.nIn];     
    sz5 = [obj.N,    1];           
    sz6 = [obj.N,    1];           
    sz7 = [obj.N,    1];           
    sz8 = [1,        obj.nOut];    
end
function [sz1, sz2, sz3, sz4, sz5, sz6, sz7] = getInputSizeImpl(obj) % Input dimensions
    sz1  = [obj.nState,  1];                 
    sz2  = [obj.N,       obj.nDst];          
    sz3  = [obj.N,       1];              
    sz4  = [obj.N,       1];                
    sz5  = [obj.N,       1];                
    sz6  = [obj.N,       1];                
    sz7  = [1,           1];                
end
function cp1 = isInputComplexImpl(~) % Inputs are complex numbers?
    cp1 = false;
end
function [cp1, cp2, cp3, cp4, cp5, cp6, cp7, cp8] = isOutputComplexImpl(~) % Outputs are complex numbers?
    cp1 = false;
    cp2 = false;
    cp3 = false;
    cp4 = false;            
    cp5 = false;
    cp6 = false;
    cp7 = false;
    cp8 = false;
end
function fz1 = isInputFixedSizeImpl(~) % Input fixed size?
    fz1 = true;
end
function [fz1, fz2, fz3, fz4, fz5, fz6, fz7, fz8] = isOutputFixedSizeImpl(~) % Output fixed size?
    fz1 = true;
    fz2 = true;
    fz3 = true;
    fz4 = true;
    fz5 = true;
    fz6 = true;
    fz7 = true;
    fz8 = true;
end

Answer 1

[Prateekshya]

Hi Manu,

As per my understanding you want to know the usage of "tilde" (~) in MATLAB function arguments.

This operator is used for the unused input arguments. The corresponding input arguments, which are replaced by "tilde" (~) are ignored. For more information you can follow this link: https://in.mathworks.com/help/matlab/matlab_prog/ignore-function-inputs.html

I hope this helps!