Do you mean you want to sample a larger range? If so, you need to change the min and max values of the prior in your .yaml file (though it looks like your prior is already covering the range 0 to 6).
If you've already run your chains and you want to simply change what is plotted by GetDist, you can include a file with the same name as your chain files, with the file type .ranges, in the same directory as your chain files. This file lists the minimum and maximum values for each parameter when plotted. It looks like this:
Code: Select all
omegabh2 0.5000000E-02 0.1000000E+00
omegach2 0.1000000E-02 0.9900000E+00
H0 0.5500000E+02 0.8500000E+02
tau 0.5800000E-01 0.5800000E-01
.ranges files are generated automatically by CosmoMC, but perhaps they are not generated by Cobaya. You don't need to specify a range for every parameter, so you could create such a file by hand, just giving the range for Neff. More info here under "Samples file format": https://getdist.readthedocs.io/en/latest/intro.html