Your code lacks the definition of X and Xres to run on my machine but I'll still give it a try.
I assume that the line
q = integral(funRea,5,Xres)
means that you want 'funRea' to be evaluated from 5 to some scalar 'Xres'.
I also deduct from your code that you want 'funRea' to be evaluated from x = 5 to Xres.
In order to achieve that you need a basic structure like
W = [1.1 2.2 3.3];
f_handle = @(x) my_function(x,W);
integral(f_handle,5,10)
function y = my_function (x1,x2)
y = x1.^2 + x2(1);
end
Notice that 'integral' expects a function handle with only one input, here it's 'x'. The second input of 'my_function' gets fed directly during the declaration of the function handle 'f_handle = @(x) my_function(x,W)'.
