R_abs_twin observed data : 0.012 R_abs_twin calculated data : 0.300
Is R_abs_twin the same thing as Robs_twin in Lebedev, Vagin, Murshudov. Acta Cryst. (2006). D62, 83-95 ?
And I guess I have rotational pseudo symmetry with Rcalctwin < 1/2.
Correct.
Interestingly when I run xtriage when the data is scaled into P 41 21 2 I get the following stats R vs R statistic: R_abs_twin = <|I1-I2|>/<|I1+I2|> Lebedev, Vagin, Murshudov. Acta Cryst. (2006). D62, 83-95
R_abs_twin observed data : 0.012 R_abs_twin calculated data : 0.521
since r_abs_twin or r_obs_twin ~= 0, that's an indicator for perfect twinning.
when data is scaled in P 41 21 2 and you still get twin laws, it means your cell still has higher symmetry. what are your unit cell parameters? P