Cobaya: Requiring the CAMB Pk nonlin_ratio

[Minh Nguyen]

Hi,

I have introduced some scale-independent scaling into the CAMB nonlinear module halofit.f90, basically modifying the growth factor D^2(z).

Now I wonder if there is a way to access directly the CAMB_PK%nonlin_ratio within the get_requirements() or get_theory() inside a cobaya likelihood class. (I actually need D(z) but I can get that easily from the nonlin_ratio)

I guess I could call get_Pk_grid() twice, one for linear and one for nonlinear, then take the ratio, if there's no direct access.

Thanks!!

EDIT: Actually, I had to change get_Pk_grid() -> get_Pk_interpolator() since the latter works, but the former didn't, at least for me. It kept complaining that Matter power delta_tot, delta_tot not computed. Not really sure why, esp. given that the way the delta components are specified is exactly the same for both functions?

[Antony Lewis]

There's no specific support for nonlin_ratio, getting both linear and nonlinear should I guess work.

If you have a reproducible problem, please submit an issue on github with the reproducing test case.