I am trying to numerically evaluate an integral. I have a function to be integrated,
ftbI[s,a] with undetermined variable(s)
a. I create a function that evaluates the integral, given the value of this variable, i.e. :
Now, inside of
ftbI are other functions. One of these functions is an interpolation between some data points. The integral will integrate up to
Inf , so extrapolation will be used, but this is okay.
You'll see that there are a bunch of these "interpolatingFunctions" floating around. I am assuming that this is the problem with my Nintegrate. So my question is, what are these interpolatingfunctions? I've tried evaluating the part of
ftbI that is the interpolation part that I mentioned above, and it seems to give me a real number anywhere within the region of integration, so I am unclear why my
ftbI can't be evaluated properly.
Any guesses as to what is going on here, or things I can try to further explore issue are greatly appreciated. I might be wrong as to the issue of my integration, what I have said is just my guess. Thank you