MATLAB: Negative index of matrix

diodematrixnegative index

I want to implement this code but I am unable to do so…

for m = 3:-1:-3
    for n = 3:-1:-3
            Y( m,n) = G(center_index + (m-n))  +  (-1i*m*w*C(center_index  + (m-n)));
end
end

G and C are vectors.

Can someone please help?

Best Answer

Like this

m = 3:-1:-3;
n = 3:-1:-3;
for i = 1:numel(m)
    for j = 1:numel(n)
            Y( i,j) = G(center_index + (m(i)-n(j)))  +  (-1i*m(i)*w*C(center_index  + (m(i)-n(j))));
end
end

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MATLAB: Negative index of a matrix

 for n = 1:5
   m = -n:n;
   for i = 1:numel(m)
     A(i, n) = m(i)*n;
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MATLAB: Error: Subscript indices must either be real positive integers or logicals. Please help me. My code

Hint: Never define a variable named exp. If you do, you will get that error.

Try this:

which exp -all

If that is not the problem, then look carefully at your code. Is there ANY place where you have a variable with NO operator between the variable and an open parens? Consider this line from your code:

n)*n*z)+l*n*(-m^2*z+lamda*n^2*(n+m(-3+n*z))))))/((exp(l*m).*m^2-exp(l*n).*lamda.*n^3.*

What might you have intended by the fragment m(-3+n*z)?

Is m a function? Is m a variable to be indexed by the expression -3+n*z? Or did you really intend there to be an operator between the m and the ( ?

When you get an error like this, look carefully at your code. If I could find it easily enough, surely you could have found it in much less time than it took me to answer this question.

There may be other errors. Check your code.

Best Answer

Related Solutions

MATLAB: Negative index of a matrix

MATLAB: Error: Subscript indices must either be real positive integers or logicals. Please help me. My code

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