
Figure 3
Example demonstrating the possibility of negative CC_{1/2} when rejecting reflections with negative intensities from a data set. The plots show _{1} versus _{2} for simulated data having Gaussian noise and no signal ( = 0). (a) 1000 unique reflections, each represented by two observations; no rejections. The correlation of _{1} and _{2} is near zero. (b) From the 1000 unique reflections, those with negative intensity (_{1} + _{2} < 0) were rejected. The resulting correlation between _{1} and _{2} is about 0.47. (c) From the 1000 unique reflections, those with negative _{1} or negative _{2} were rejected, also resulting in positive (merged) intensity. The resulting correlation between _{1} and _{2} is near zero. 