numeric integration

*To*: mathgroup at smc.vnet.net*Subject*: [mg81129] numeric integration*From*: "C. Seja" <p5secr2 at uni-jena.de>*Date*: Thu, 13 Sep 2007 06:29:44 -0400 (EDT)

Hi, I'd like to intergate a function f with NIntegrate: NIntegrate[f[x], {x, 0, 0.1}] But this doesn't work if, i.e. f = NIntegrate[Sin[x + #], {x, 0, 1}] & It will give a wrong result (0.7 instead of 0.05). Why? I mean, I can evaluate f at any point without problems, i.e. f[0.1] gives 0.37. So why doesn't NIntegrate[f[x], {x, 0, 0.1}] work? It doesn't even give a warning! So, is there a proper way to do this (without using one two-dimensional NIntegrate)? Regards C. Seja