compute numerical integral by matlab

2011 4 7
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Hello everybody Please,I want to know,how compute integral from 2 to infinity for any function using matlab? thanks in advance

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Matt Fig
Matt Fig 2011-4-7

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Put the function in an anonymous function, then use QUADGK.

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reem
reem 2011-4-7
Thank you so much Matt
but when I wany to run the function,some error occur
how can I solve it?
function y = myfun(X)
y=(1/sqrt(2*pi))*exp(-0.5*X^2);
Q=quadgk(@myfun,2,inf)
display(Q)
end
??? function y = myfun(X)
|
Error: Function definitions are not permitted at the prompt or in
scripts.
Matt Fig
Matt Fig 2011-4-7
Don't put the keyword: function in a script or at the command line. Just do this:
y=@(X)(1/sqrt(2*pi))*exp(-0.5*X.^2); % Anonymous func.
Q=quadgk(y,2,inf)
reem
reem 2011-4-7
Thank you so so so much
you are very kind and smart
I hope all best things for you
Kind regards

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