Public repository of the Cosmic Linear Anisotropy Solving System (master for the most recent version of the standard code; GW_CLASS to include Cosmic Gravitational Wave Background anisotropies; classnet branch for acceleration with neutral networks; ExoCLASS branch for exotic energy injection; class_matter branch for FFTlog)
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Discrepancy between class v2.2.0 and later versions #272
We recently noticed a discrepancy between the matter power spectrum and transfer functions from different versions of class, in particular between v2.2.0 and v2.4.1, at k > 0.1. The two versions are run with the same .ini file. We also compared the output of v2.4.1 against the most recent version 2.7.2, which agrees rather well with v2.4.1. So it seems to us that there is some issue with v2.2.0. Can you please clarify on this. (see the plots attached, the %diff is the percentile difference between versions v2.4.1 and v2.7.2 with v2.20)
pk_comparison_class.pdftk_comparison_class.pdf
Hi,
We recently noticed a discrepancy between the matter power spectrum and transfer functions from different versions of class, in particular between v2.2.0 and v2.4.1, at k > 0.1. The two versions are run with the same .ini file. We also compared the output of v2.4.1 against the most recent version 2.7.2, which agrees rather well with v2.4.1. So it seems to us that there is some issue with v2.2.0. Can you please clarify on this. (see the plots attached, the %diff is the percentile difference between versions v2.4.1 and v2.7.2 with v2.20) pk_comparison_class.pdf tk_comparison_class.pdf