MATLAB: Signum fuction with multiple input variables

mathematicsMATLABmatlab function

how to define a signum fuction with multiples input vectors.

like, y = sign(v1, v2, v3……)

where v1, v2, v3….. are vectors

Best Answer

If the set of v are the same size, then

    y = sign([v1,v2,v3]);

Related Solutions

MATLAB: How to define an arbitrary constant for equations

If you are talking about making an assumption, you can do it as follows:

v1=6;
v3=18;
syms v2 v4 v5 v6
eqn1= -v4+v5==-v3;
eqn2= -v2+v6==v3;
eqn3= -v5-v6==-v1;
assume(v6~=0)
[v2 v4 v5 v6]=solve(eqn1, eqn2, eqn3);
[v2 v4 v5 v6]

MATLAB: How to define the own signum function

Anthony, looking good. Put the code into a function and use inputdlg to allow inputting the numbers more easily. Alternatively, you could simply let the user define the matrix X and use it as an input for the function.

 function Y = my_sig()
 prompt = {'Input dialog'};
 name   = 'Input dialog';
 Xcell  = inputdlg(prompt, name);
 X      = str2num(Xcell{1});
 Y      = zeros(size(X));
 for ii = 1:numel(X)    % loop through all elements of the vector
    if X(ii) < 0
        Y(ii) = -1;
    elseif X(ii) == 0
        Y(ii) = 0;
    else
        Y(ii) = 1;
    end
 end
 end

Best Answer

Related Solutions

MATLAB: How to define an arbitrary constant for equations

MATLAB: How to define the own signum function

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