Unrecognized function or variable 'x'.

function y=f(x) %error message Input argument x might be unused

m = linspace(0,Inf,100);

x = linspace(-2.*pi,2.*pi);

y= int(x.^2 .* exp(-(x/2)), 0, m) - 8;

Answer 1

[the cyclist]

Because you have the code

x = linspace(-2.*pi,2.*pi);

the value of x that comes in via the input is never used. That is why you see a warning message.