Borhani, David wrote:
... but I think pretty much everyone has converged on using it for the past many years.
Many small molecule crystallographers seem to refine on intensity and so avoid need this procedure. Towards the end of the recent thread "Wilson plot from truncated.mtz" it had seemed like this forum was starting to see that light?
In short - if your observations are supposed to be noisy in the "plus_or_minus sigma" sense then the peaks which are much less than the sigma should come out negative almost half of the time. Truncate would appear to be for the case where you want an estimate of the true magnitude of the structure factor, "F", and not your experimental data.
Jon
