CAMB: Adjusting parameters

[Simon Hall]

Hi,

By way of beginning, though it will become obvious with my question, I'd like to say that I am very much a novice when it comes to using CAMB.

The accompanying documentation explains that the adjustment of the fundamental cosmological parameters can be achieved through altering the params.ini file. I want to change omega_nu/omega_lambda. Having done this, and ran the program, the parameters remain unchanged. I've searched through all of the other files, looking to see if something requires alteration in addition, and I found omega_nu listed in the camb.f90 file. Changing this does nothing either. I'm really not sure what I'm doing wrong. Any assistance would be greatly appreciated.

Regards,
Simon

[Antony Lewis]

See use_physical and comments in the ini file.