finding integration by using quad command

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sibananda mohanty
sibananda mohanty 2012-11-7
function y =myfun(x) y=1/(x^3-2*x-5); Q=quad(@myfun,0,2)
after running this programme a get this error ??? Input argument "x" is undefined.
Error in ==> myfun at 2 y=1/(x^3-2*x-5);
please help to solve this programme

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回答（1 个）

Andrei Bobrov
Andrei Bobrov 2012-11-7
编辑：Andrei Bobrov 2012-11-7
y=@(x)1./(x.^3-2*x-5);
Q=quad(y,0,2);
or
% function in m-file: myfun.m
function y =myfun(x), y=1./(x.^3-2*x-5); end
% use myfun function
>> Q=quad(@myfun,0,2)

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