On Mon, 2011-07-11 at 14:15 -0400, Jennifer Weinreich wrote:
what is the common practice with respect to how many significant figures should be used for reporting Rfree
If you look up crystallographic papers, you'll find that people routinely report R-values with 3 significant digits, i.e. 23.4% and such. The fourth digit is unreliable - try refining against the same dataset with different test set and you'll find that the Rfree varies within at least 0.1% (depending on resolution, data quality, etc). Most programs report 4 digits, which in my view is needed so that you can properly round it. PDB lists three significant digits as well. -- "I'd jump in myself, if I weren't so good at whistling." Julian, King of Lemurs