Computers and software • Re: GetDist: H0 and sigma8 as derived parameters
GetDist doesn't know anything about cosmology, so you'd have to compute the sigma8 values externally, e.g. by looping over the chain parameters and computing it.Cobaya could do this by importance...
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View ArticleComputers and software • CAMB: get specific Newtonian-gauge power spectrum
I am trying to reproduce the power spectrum which is the (solid) red line from Fig. 1 of https://arxiv.org/pdf/1105.5292I have managed to get CAMB to return the dashed black line behavior from the...
View ArticleComputers and software • Re: CAMB: get specific Newtonian-gauge power spectrum
Box 32 of the example notebook shows how to construct things in different gauges as a function of k and timehttps://camb.readthedocs.io/en/latest/CAMBdemo.html(don't think there's a way to go directly...
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Computers and software • Cobaya error with Planck likelihoods
Hello!I'm having trouble running the Planck data. I created a .yaml file using cobaya-cosmo-generator, selecting theory camb and the dataset Planck 2018 CMB-marginalized lensing only, where I use the...
View ArticleComputers and software • Re: Cobaya error with Planck likelihoods
Are you using the latest version of Cobaya? The CMBMarged likelihood should not be using clik.Statistics: Posted by Antony Lewis — June 30 2025
View ArticleComputers and software • Cobaya: silent running?
Does Cobaya have any sort of "silent mode" (like --silent in montepython)? I run a lot of likelihoods, some of which spit out a lot of text at each step, so for long runs with many chains the log file...
View ArticleComputers and software • Re: Cobaya: silent running?
Normally you shoulnd't get logging message each step unless using --debug or have debug: true in the yaml.Statistics: Posted by Antony Lewis — July 07 2025
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View ArticleComputers and software • cobaya?/CLASS: confusing P(k) redshift range error
I'm running a rather convoluted set-up in cobaya which includes classy as well as a translation layer to CosmoSIS, which requires specific settings with respect to calculating the non-linear P(k). I...
View ArticleComputers and software • Re: AIC BIC calculation using MCEvidence
Hello, how did you use MCevidence by using chains from CosmoMC? I have trying to compute the evidence of the LCDM model using chains obtained from running CosmoMC and I got errors.For AIC and BIC, is...
View ArticleComputers and software • CAMB: Accuracy of the linear power spectrum at large k?
Hi!I am using the F90 version of CAMB cloned from git in 2025 (on linux server).Question:I am wondering what would be the best way to increase the accuracy of the linear power spectrum at large k of...
View ArticleComputers and software • Re: CAMB: Accuracy of the linear power spectrum at...
May be more affected by how the temperature perturbations/perturbed recombination handled on very small scales, CAMB also has Code: evolve_delta_xe. Of course you shouldn't expect agreement if...
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