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Hi James: Actually I did OVERLAPMAP calculation in this way. I first flagged the map grid points by using the provided pdb information, which serves as "mapin3" for the OVERLAPMAP calculation. However, the calculated CCs or RSRs are either based on each individual atom, residue or map section, but it didn't calculate a single CC or RSR by integrating over the whole region encomprassed by a group of residues as I wanted. Maybe there is something I didn't discovered in OVERLAPMAP to do this? I appreicate if you could point out which key word I need to use. This will save me lots of time in coding on the map:-( Thanks a lot! Best Regards, Hailiang > > OVERLAPMAP will do this, but you need to calculate a "label map" with > SFALL first and provide that to OVERLAPMAP as "mapin3", as MW and others > have pointed out already. > > RTFM: > http://www.ccp4.ac.uk/dist/html/overlapmap.html#notes_mapin3 > http://www.ccp4.ac.uk/dist/html/sfall.html#mode_atmmap_resmod > > -James Holton > MAD Scientist > > Hailiang Zhang wrote: >> Dear Eleanor: >> >> Yes, this is something I want to do (RSR and CC). But I just want to do >> the calculation based on a group of residues or atoms, and it seems >> OVERLAPMAP doesn't do it, so I think I have to find other ways. >> >> Hailiang >> >> >>> mapdump does this if you select the right flags. But as Ian says you >>> will get a LOT of numbers. You dont say why you want this information, >>> but if it is to find the electron density at an atom site overlapmap >>> will do that if you ask for "real space rfactor" >>> >>> eleanor >>> >>> Hailiang Zhang wrote: >>> >>>> Hi, >>>> >>>> I wanted to convert a binary ccp4 map file to a readable format so >>>> that >>>> I >>>> can retrieve the electron density at each real space grid point. Just >>>> tried MAPTONA4 and MAPEXCHANGE, but the resulting ascii file are not >>>> readable, and I didn't find any documentataion about how to read them. >>>> Could somebody give me any hint? Thanks a lot! >>>> >>>> Best Regards, Hailiang >>>> >>> > > >