cosmomc rstar help

[jonah saidian]

hey guys I ran some chains on cosmomc then made my getdist and now have a bunch of plot data files. I'm trying to make a graph like the one here at the end of this article "1403.3985" class="postlink">http://arxiv.org/abs/arXiv:1403.3985" and im having trouble figuring out how to make it r_0.002 from r_star which I have and can work with. any help would be appreciated thanks

[Antony Lewis]

The "r02" derived parameter is what you want.

[jonah saidian]

Sorry I'm not very familiar with cosmomc yet did I need to define the derived parameter before running my chains or can I define now that they have been run? Also how would I go about defining it thank you

[Antony Lewis]

r02 is defined by default and in output chains.

[jonah saidian]

ok thanks Anthony I found it in the output chains but I cant find it in the plot_data files made by getdist is there something specific I need to do to add that into the parameters in the plot_data files.

[Antony Lewis]

Add it to one of your getdist .ini file plot settings, either plot_2D_param or (what I usually do) triangle_params .

[jonah saidian]

I tried doing that but I'm still not getting any data with r02 in it i have the line "triangle_params = omegabh2 omegach2 tau omegak mnu nnu yhe Alens ns nrun logA r H0 omegam omegal sigma8 r02" in my distparams.ini file the i run getdist with it and am not getting anything different. do you know why that is?

[Antony Lewis]

No (assuming you have triangle_plot = T).

Of course you don't normally need to look at plot_data yourself, the python scripts handle loading and plotting of the relevant files; but the files do need to be there for it to work.

[jonah saidian]

ya the files seem to not be in there I'll keep trying different things but thank you for all of your help so far

[jonah saidian]

hi anthony I have been fiddling with this for a while now. I found if I made my own paramnames file and pulled r_02 and ns from there I would get a plot but an inaccurate one I'm now looking further into the problem and see that when I run getdist it only processes 54 of the 60 parameters in my original parameters file "using 64014 rows, processing 54 parameters" I also noticed that the number for r_02, 29, is skipped in in the stats files produced by getdist so I think getdist isnt processing r02 at all. do you know anything about this or any way I could fix it?