Error in quad function-maximum function count exceeded

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Elsa Sw
Elsa Sw 2011-12-23
Hi all, i need help using the quad function.
function y = myfun(x) y = exp(b*z)*exp((6*a.^2-i*k*w.^2*z)/(z.^2+a.^2))./(a+i*z);
>> F = @(z) exp(b*z)*exp((6*a.^2-i*k*w.^2*z)/(z.^2+a.^2))./(a+i*z); Q = quad(F,0,2); Warning: Maximum function count exceeded; singularity likely. > In quad at 106
Anyone know what the warning means?? Thank you..

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Andrei Bobrov
Andrei Bobrov 2011-12-23
try use quadgk
for example:
b=1;a=1;k=1;w=1;
F = @(z) exp(b*z).*exp((6*a^2-1i*k*w^2*z)./(z.^2+a^2))./(a+1i*z)
quadgk(F,0,2)
quad(F,0,2)

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