When i try to calculate the convolution of two functions i get: Warning: Using only the real component of complex data.

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Deniz Bozdogan 2021-2-24

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/755249-when-i-try-to-calculate-the-convolution-of-two-functions-i-get-warning-using-only-the-real-compone

评论： Tesfaye Girma 2021-2-26

m3=length(x3);
n3=length(h1);
X3=[x3,zeros(1,n3)];
H3=[h1,zeros(1,m3)];
for i=1:n3+m3-1
    Y3(i)=0;
    for j3=1:m3
        if(i-j3+1>0)
            Y3(i)=Y3(i)+X3(j3)*H3(i-j3+1);
        else
        end
    end
end
figure;
subplot(3,1,1); stem(x3, '-b^'); xlabel('n');
ylabel('x[n]'); grid on;
subplot(3,1,2); stem(h1, '-ms');
xlabel('n'); ylabel('h[n]'); grid on;
subplot(3,1,3); stem(Y3, '-ro');
ylabel('Y[n]'); xlabel('n'); grid on;
title('Convolution of Two Signals without conv function')