Computers and software • Re: CosmoMc:Modify the L-CDM model
Depends on what the underlying physics is, generally can't modify just the background. (dtauda is main function that compute the inverse of the conformal time derivative of the scale...
View ArticleComputers and software • Using MCMC values from planck legacy archive
Hi, I'm a new user of cobaya and was wondering if it's possible not to compute the MCMC and use the ones that PLA provides in a way to speed up the computation time. In the case were it's possible,...
View ArticleComputers and software • Re: Using MCMC values from planck legacy archive
Can certainly use PLA chains if that's what you want (or can importance sample from it).Statistics: Posted by Antony Lewis — February 25 2025
View ArticleComputers and software • CMB number of data points N for AIC, BIC calculations
Hello everyone,I want to ask if any of you know the number of data points from the full dataset (TT, TE, EE) from l=0 to l=2508 of the CMB. I want to calculate the AIC and BIC of some cosmological...
View ArticleComputers and software • ACTPol DR4 CMB Power Spectrum Likelihood
I successfully installed the ACTPol DR4 likelihood following the instructions from https://github.com/ACTCollaboration/pyactlikeWhen I run the .yaml file specifying the theory block and adding the...
View ArticleComputers and software • Re: ACTPol DR4 CMB Power Spectrum Likelihood
Try their https://github.com/ACTCollaboration/pyactlike/tree/cobaya_updates branch.Statistics: Posted by Antony Lewis — February 27 2025
View ArticleComputers and software • CAMB correlation function
Hi, I'm trying to plot the correlation function of the experimental D_\ell^{TT} from planck, but the function needs a 4 dimensional array and I only have a one dimensional array, so I did this:Code:...
View ArticleComputers and software • Re: CAMB correlation function
Hi, has anyone found something?Statistics: Posted by Alv Men — March 03 2025
View ArticleComputers and software • How many arguments for camb.set_params
Hi, I have a file .minimum that is intended (or at least thats what planck archive says) to contain the cosmological parameters to get the best fit given a model, but the files contains more than 200...
View ArticleComputers and software • Re: How many arguments for camb.set_params
I got this list from the chat bot:omegabh2: ombh2omegach2: omch2theta: Typically, H0 is used instead.tau: tauomegak: omklogA: Use As instead, calculated from logA using As = exp(logA) * 1e-10ns:...
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Computers and software • Problem with camb.correlations.cl2corr function
Helo everyone, I'm having some problems getting the correlation function of the [math]D_\ell^{TT} power spectrum, I'm plotting the theoreticla best fit for the TT power spectrum and I'm plotting the...
View ArticleComputers and software • Cosmomc:Add new observations to Cosmomc
If I want to add new observations to the cosmomc, how do I do it?Thank you very much for your answer.Statistics: Posted by han ning — March 10 2025
View ArticleComputers and software • Re: Problem with camb.correlations.cl2corr function
Hard to follow what exactly you are asking, but do you cls sent to camb start at L=0?Statistics: Posted by Antony Lewis — March 11 2025
View ArticleCosmoCoffee • Can not register, username problem
Hi,I'm having trouble with registration. Although I have tried to register with several usernames, I always get the error message "The username you entered has been disallowed or contains a disallowed...
View ArticleComputers and software • Re: Problem in CosmoMC with mpirun
Hello Prof. Lewis,Sorry for replying to an old thread - I was wondering if this is still an issue now? i.e. Is it still recommended that we use intel before 2019 to use mpirun?For some context, we’re...
View ArticleConferences and meetings • "The Cosmic Dawn", CNRS thematic school,...
We are pleased to announce the CNRS thematic School « The Cosmic Dawn » to be held October 5th - 11th, 2025 at Institut d’Études Scientifiques de Cargèse (IESC), France.It aims to bring together...
View ArticleComputers and software • Set a prior to the inverse of a sampled parameter
I want to set a prior to the inverse of the effective sterile neutrino mass. Would this be the correct way to add the prior in the .yaml file? Code: params: meffsterile: latex: m_\mathrm{effst}...
View ArticleComputers and software • Re: Set a prior to the inverse of a sampled parameter
Follow the pattern of getting As from sampled logA, e.g.Code: logA: prior: min: 1.61 max: 3.91 ref: dist: norm loc: 3.05 scale: 0.001 proposal: 0.001 latex: \log(10^{10} A_\mathrm{s}) drop: true As:...
View ArticleComputers and software • MCMC.f90: Couldn't start after 1000 tries
camb can be executed correctly after modification, but when running the chain, an error is reported, MCMC.f90: Couldn't start after 1000 tries - check starting ranges, I don't know what the reason...
View ArticleComputers and software • CosmoMC: Using external correlation functions/matrices
I have an indexed correlation function/matrix in units of [math]h^{-1} \text{ Mpc} and its associated power spectrum, and would like to know how I can use it as the sample data in CosmoMC instead of...
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