Fsolver is not finding solution

2015 4 10
1 个回答
更新时间：2015 4 10
9 次查看（30 天）

0 个投票

I am trying to test out fsolve for the first time by solving this equation for which I already know it should output around .045 (from a different solver). But I keep getting
''fsolve stopped because the problem appears regular as measured by the gradient, but the vector of function values is not near zero as measured by the default value of the function tolerance.''
Any input?
Code:
lambda=1;
alpha=40;
p=.1;
F = @(V) 1-V-lambda-lambda*p*(exp(1)^(alpha*V)-1)+lambda*(exp(1)^(alpha*V)*sqrt(1+lambda*alpha*p*exp(1)^(alpha*V))/(sqrt(2*alpha*pi)));
InitialGuess = .04;
Options = optimset('Display','iter');
XY = fsolve(F, InitialGuess, Options);

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回答（1 个）

Torsten
Torsten 2015-4-10

0 个投票

Plot your function and you will see that it has no zero.
Best wishes
Torsten.

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