Sign of imaginary value changes after converting to array
显示 更早的评论
When I calculate these complex numbers, they have positive imaginary components. However, in the complex array z, all of the nonzero imaginary components become negative.
I can't find this behavior in the documentation so I do not understand what is going on.
a = 2 + 1j;
b = 1 + 3j;
% a)
z1 = a*b;
% b)
z2 = b*conj(b);
% c)
z3 = a^3;
% d)
z4 = b/a;
z = [z1; z2; z3; z4];
采纳的回答
My guess is that you accidentally used the conjugate transpose operator (') instead of the non-conjugate transpose operator (.') somewhere in your code.
v = (1+1i)*(1:5);
imag(v)
x = v.';
imag(x) % non-conjugate
y = v'; % conjugate
imag(y)
更多回答（1 个）
James Tursa
2021-2-11
Here is what I get:
>> a = 2 + 1j;
>> b = 1 + 3j;
>> z1 = a*b
z1 =
-1.0000 + 7.0000i
>> z2 = b*conj(b)
z2 =
10
>> z3 = a^3
z3 =
2.0000 +11.0000i
>> z4 = b/a
z4 =
1.0000 + 1.0000i
>> z = [z1; z2; z3; z4]
z =
-1.0000 + 7.0000i
10.0000 + 0.0000i
2.0000 +11.0000i
1.0000 + 1.0000i
Try clearing your workspace and starting from scratch. Maybe you inadvertently used different variables?
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