A general question in mathematics

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jafar 2013-7-24

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关闭： MATLAB Answer Bot 2021-8-20

    Hi
    Please help me do the following math operation and apply every array of a vector (x) on it:
    x=randn(1,1000);
    diff(log(quad(@(w)exp(ixw-abs(w)^2,-500,500))) {I use quad because the function is not closed formula)
    in the other words i want to integral from this function [ixw-abs(w)^2]dw
    The phrase is derived in terms of X,
    after that put logarithm on it(Ln),
    next differentiation with respect to x,
    then placed array of vector x individually to the result,
    best regards

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Answer 1

Andrew Reibold 2013-7-24

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 Q = quad(FUN,A,B) tries to approximate the integral of scalar-valued
    function FUN from A to B to within an error of 1.e-6 using recursive
    adaptive Simpson quadrature.

Example: Q = quad(@(x)myfun2(x,5),0,2);

Where are your A and B Parameters?

Are -500 and 500 supposed to be A and B? You have them trapped inside of exp(ixw-abs(w)^2,-500,500) so that means you don't have enough input arguments