Using InterpolatingFunction in Argument of NIntegrate

*To*: mathgroup at smc.vnet.net*Subject*: [mg57783] Using InterpolatingFunction in Argument of NIntegrate*From*: Iggy <blah at blah.com>*Date*: Wed, 8 Jun 2005 03:21:32 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

Hi, I am solving numberically an ODE and outputing the results into a function f(x). This f(x) is some InterpolatingFunction. I would like to then use f(x) in a call to NIntegrate in a way such as: NIntegrate[g(f(x),{x,0,1}] However I get an integrand not numerical error. I can easily Plot g(f(x)) and if I replace f(x) with some function like x^2 everything works too. How can I get around this? Thanks, Iggy