mapmask will do this. Eleanor See the documentation - it is a bit confalued but certainly works..
Hailiang Zhang wrote:
Hi, I want to calculate the portion of the "noise" density with respect to the whole unit cell (assuming the model is good enough). I plan to first calculate the integral density within the whole unit cell, then build a atom mask around the molecule and calculate the integral density within the mask only. I tried UPPSALA mapman, but it seemed not working as expected. Can somebody refer me some utilities in ccp4 which could accomplish this task? Thanks! Hailiang
