fsolve and complex solution?
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Hello,
my test function is f=x^2+1 the slution is easy : x1=i orx2=-i (both are imaginary)
fsolve is not finding these values...why? fsolve returns 0 for a solution??
Thank you.
4 Comments
Walter Roberson
on 18 Jun 2012
And you are not getting any warning message about it not being able to solve the problem?
I take it you overlooked this line in the documentation:
"fsolve only handles real variables. When x has complex variables, the variables must be split into real and imaginary parts."
Accepted Answer
Walter Roberson
on 18 Jun 2012
function F = myfun(ripair)
x = ripair(1) + ripair(2)*1i;
F = x^2+1;
if imag(F) ~= 0; F = 10^5; end %you need to emit finite real value from myfun
end
and make sure your x0 has a pair of values.
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