Re: Integration

*To*: mathgroup at smc.vnet.net*Subject*: [mg90321] Re: Integration*From*: zerosumgame <rogerhw at hotmail.com>*Date*: Sat, 5 Jul 2008 04:52:50 -0400 (EDT)*References*: <g4kl8m$lru$1@smc.vnet.net>

On 4 Jul, 08:59, Eomer <eomer... at hotmail.com> wrote: > Hello, > > I would like to numerically integrate a particular function. I define f to be equal to that function. Then, I do N[Integrate[f,{x,0,1}]. The output is f. Why? Why don't I get an answer? > > Thanks > Rohan. Rohan You have not made x an argument of f. As a result mathematica thinks f is simply a constant to be integrated between 0 and 1 which returns the constant f. N[f]=f. What you need to write is N[Integrate[f[x],{x,0,1}]. If something goes wrong after doing that you have some problem with the definition of f. Roger