MATLAB: Bug fminbnd not working

fminbndMATLAB

fplot(@(x) x*(sin(x))^2*cos(x),[-2*pi 2*pi]);
[xMin1 fvalmin1] =  fminbnd('-x*(sin(x))^2*cos(x)', -6, 6)
returns xMin1 = 1.0954
fvalmin1 = -0.3963

How is this possible, look at the plot?

No bug. fminbnd is a local minimizer, not a global minimizer.

There are issues with the definition of 'myfun'. Compare it with the following to see the errors.

function f = myfun(x)
x1 = x(1);
x2 = x(2);
x3 = x(3);
f = (1./(1+(x1-x2).^2)) + sin(0.5*pi.*x2.*x3) + exp(((-x1+x)./x2)-2).^2;
end

Convert vDS_ via "matlabFunction" to a numerical function handle before calling "fminbnd".