Summary:

Change N_Eff to ESS as N is misleading as it in manual refers to to the number iterations in each chain (or is often used for the number of observations). ESS would be more clear as it is acronym for effective sample size. posterior package used .e.g by CmdStanR has at least moved to use ESS.

Description:

From this comment: #907 (comment)

Reproducible Steps:

run current bin/stansummary program

Current Output:

current output

Expected Output:

desired output: column labels "ESS" and "ESS/S"

Additional Information:

Provide any additional information here.

Current Version:

v2.23.0