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R-factors: Difference between revisions
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→Relation between R and Rfree as a function of resolution
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* many more plots: http://xray.bmc.uu.se/gerard/supmat/rfree2000 | * many more plots: http://xray.bmc.uu.se/gerard/supmat/rfree2000 | ||
* harry plotter (java): http://xray.bmc.uu.se/gerard/supmat/rfree2000/plotter.html | * harry plotter (java): http://xray.bmc.uu.se/gerard/supmat/rfree2000/plotter.html | ||
* When the resolution is plotted on a logarithmic scale, the most frequent values (modes) are practically linear functions allowing their easy interpolation / extrapolation as (Urzhumtsev et al, 2009) | |||
mode(R) = 0.091*ln(resolution) + 0.134 | |||
mode(Rfree-R) = 0.024*ln(resolution) + 0.020 | |||
References: | References: | ||
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* GJ Kleywegt and TA Jones (2002). Homo Crystallographicus - Quo vadis? Structure 10, 465-472. (reprint from http://xray.bmc.uu.se/cgi-bin/gerard/reprint_mailer.pl?pref=65) | * GJ Kleywegt and TA Jones (2002). Homo Crystallographicus - Quo vadis? Structure 10, 465-472. (reprint from http://xray.bmc.uu.se/cgi-bin/gerard/reprint_mailer.pl?pref=65) | ||
* Urzhumtsev, Afonine & Adams (2009) Acta Cryst., D65, 1283-1291. | |||
== what kinds of problems exist with these indicators? == | == what kinds of problems exist with these indicators? == | ||