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Random error in get_cmb_power_spectra ?

Posted: September 06 2017
by Felipe Maldonado
Hello,
Is there any reason to expect get_cmb_power_spectra to return power spectra with slightly different values each run (same cosmology)?

I've observed a difference of the order of 1E-9 %, which is of course, minuscule, but I'd like to know if this is expected of CAMB or I did something to cause it.

Thank you very much,
Felipe

Re: Random error in get_cmb_power_spectra ?

Posted: September 06 2017
by Antony Lewis
You can expect small variations from things like random timing variations in the OpenMP threading.

Random error in get_cmb_power_spectra ?

Posted: September 07 2017
by Felipe Maldonado
Thank you for the clarification.
Felipe