how to convert complex number into double number?

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I have got this complex value from result of an equation such :( 0.7803 + 0.0000i -0.3681 + 0.5659i 0.8562 + 0.0000i -0.8941 + 0.0428i 0.7861 + 0.0000i
0.0303 + 0.8492i 0.8508 + 0.0000i -0.5537 - 0.5875i 0.7910 + 0.0000i -0.7290 - 0.2247i)
i need to convert the result to double, How?
  8 Comments
Arshub
Arshub on 25 Jan 2022
@David Hill i need to implement this function in attached image to get sequence values for x and with initial value as in program......

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Accepted Answer

Walter Roberson
Walter Roberson on 25 Jan 2022
siz=256;
x=nan(1,siz+1); %<------------PREALLOCATE!!!
y=nan(1,siz+1); %<------------PREALLOCATE!!!
Z=0.78;% initial value of control parameter Z for cofusion
E=0.95;% initial value of control parameter E for cofusion
%u=1.58;% initial value for cofusion
x(1)=0.75;% initial value
y(1)=0.2963 ; %u*x(1)*(1-x(1));%y(1) 0.2963 initial value
for j=1:siz
r=(Z/y(j));
x(j+1)= sin(r).^(3/2);
w=(E*acos(x(j)));
y(j+1)=(cos(w));
end
plot(x, y)
  2 Comments
Walter Roberson
Walter Roberson on 25 Jan 2022
Sorry, I do not know. I am not able to reproduce the authors' plots.

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