Computers and software • CAMB: Multiple Source Windows Lead to Different Cl's
I have been trying to fix up my code and I noticed that when you have multiple windows when calculating the cl's the value of the cl's will be different . Is there any reason why this may occur? I...
View ArticleComputers and software • Re: CAMB: Multiple Source Windows Lead to Different...
It uses the smallest step size needed by any window, so adding another window can affect precision of the first.(not hat is not supported - windows should be differentiable)Statistics: Posted by...
View ArticleComputers and software • PantheonPlus in CosmoMC
Hello everyone, After adding Pantheon18, eBOSS DR16, and Riess2022 to my modified CosmoMC, I'm taking the next step adding Pantheon+. However, Pantheon+ has many more columns of data than Pantheon18...
View ArticleComputers and software • CAMB: CPU usage problem
Hi,I'm now using CAMB in Python (version--1.3.6).I found that during usage, CAMB occupies all the CPU resources, even though I haven't made any multithreading settings.I'm wondering how to limit the...
View ArticleComputers and software • CosmoMC segmentation fault
Hello everyone, I am trying to run cosmomc on a virtual machine having Ubuntu 22.04 and gfortran version 11.4.0. The MPI version is mpiexec (OpenRTE) 4.1.2.The compilation of cosmomc is OK without any...
View ArticleComputers and software • Re: CAMB: CPU usage problem
You can set camb.config.TheadNum (or set OMP_NUM_THREADS env more generally).Statistics: Posted by Antony Lewis — March 18 2024
View ArticleComputers and software • Re: CosmoMC segmentation fault
Don't know, seems to be crashing in general code suggesting earlier memory corruption (or possibly compiler bug). If it works without clik, it may be a clik issue.Statistics: Posted by Antony Lewis —...
View ArticleComputers and software • CAMB: Setting massless neutrino density to zero
Hi,I'm trying to get familiar with using CAMB, so I would like to figure out its details with only a simple cosmological model where there are only matter, dark matter, and photons. I managed to...
View ArticleComputers and software • Re: CAMB: Setting massless neutrino density to zero
You can try setting nnu=0 (not sure it will work; not you also change BBN predictions if messing with number of neutrinos).AntonyStatistics: Posted by Antony Lewis — March 19 2024
View ArticleComputers and software • Cobaya: negative chi2 for a model
Hi,I am using Cobaya to test a modified model in CAMB, with only two additional modification parameters varied, and all other parameters fixed. I chose some fiducial values for the two parameters, say...
View ArticleComputers and software • CLASS: RealSpace Interface
Hi, Is there any documentation/tutorial available online for RealSpace Interface, which is an external software stored in class_public/external used to plot the power spectra?I ran the software on my...
View ArticleComputers and software • Re: Cobaya: negative chi2 for a model
The total also has contributions from the prior. The chi2 for DES should be listed separately in the chain.Statistics: Posted by Antony Lewis — March 22 2024
View ArticleComputers and software • Very small amount of Cold Dark Matter into...
Hello,I would like with a custom MCMC code to set a very small amount of Cold Dark Matter in Hi-CLASS wrapper code. Here is an attempt to run with :CODE: # Initializing Planck's...
View ArticleComputers and software • Cobaya: Fitting BAO-only likelihood
Hi,I'm trying to figure out how to perform a fit to some BAO measurements alone (so, measurements of DM/rdrag, DH/rdrag and similar). How do I set up the parameters correctly for this in Cobaya...
View ArticleComputers and software • Re: Cobaya: Fitting BAO-only likelihood
You can use derived parameters to sample Omega_m etc in the same way that As and logA are handled in the presents you can see in "cobaya-cosmo-generator" GUI. However, since rdrag is theory model...
View ArticleComputers and software • [Getdist] Setting limits on z axis (colorbar) for...
Hello,I am trying to make a 3D color bar plot (using plot_3d) with parameters x,y, and z where z is the parameter on the colorbar. I can set limits on x and y using the `lims' argument. However, I...
View ArticleComputers and software • Re: [Getdist] Setting limits on z axis (colorbar)...
range is just used to inform the density estimator of known prior ranges, it does not cut the data.You need to filter the samples, or follow e.g. bog 24 of the examples.Statistics: Posted by Antony...
View ArticleComputers and software • Re: CosmoMC does not reproduce CAMB results
Hello,How did you solve the issue? I have encountered the same problemStatistics: Posted by Xiao Bobo — April 16 2024
View ArticleConferences and meetings • Re: Challenging the standard cosmological model,...
All talks are uploaded on: https://cosmological-model.royalsociety.org/Day 1: https://www.youtube.com/live/Qo-QWCzy71Q?si=b_HWsqDLrE5E-azNDay 2: https://www.youtube.com/watch?v=o4oqUh64Up4Statistics:...
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Computers and software • CAMB: calculating the evolution of delta_photon with...
Hi,I calculated the evolution of delta_photon with respect to the redshift for given values of k using CAMB 1.5.3. An example of the result is shown in the attached figure. At about z=400, the...
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