Quote by twofishquant
With lambaCDM, I can put in some parameters and get a fit to get the lumpiness.

By the way, you can generate any function with a Fourier Series expansion. With only a few parameters, generally, you can get a pretty good fit. Your ability to put in parameters to an equation and get an approximate fit uses a similar kind of math using spherical Bessel functions or some related idea.
Jonathan