cphasematch will do it in reciprocal space and give you a variety of statistics, including F- and E-map correlation. Go to reflection data utilities/phase comparison. Maher Alayyoubi wrote: > Hi Everybody, I am a new user on the ccp4 bulletin, I have a question on > how to calculate the map correlation coefficient using Overlapamp or any > other program? > > Thank You, > > > Maher -- EMAIL DISCLAIMER http://www.york.ac.uk/docs/disclaimer/email.htm