Yes. Dale's always right. I'm sorry, I forgot about that. Cutting the resolution of a map from 2 A to 3 A is enough to get 120 A of map to display on my 7 year old mac. Rotating the map in a time frame I can stand, though, is a different issue.
Sue On Dec 5, 2013, at 12:16 PM, Dale Tronrud wrote: > > You can't go to a larger grid without decreasing the resolution of > the map first. If you have a 1 A resolution map and sample it with a > 2 A spacing you are not likely to get anything useful (Your FFT > program should complain mightily too). If you cut the resolution to > 4 A and sample at 2 you might have some hope. > > You can cut the resolution in Coot when you turn on expert mode. > The sampling rate in Coot is a function of the resolution so you should > automatically drop to a courser grid when you cut the resolution. > > Dale Tronrud > > On 12/05/2013 10:47 AM, Roberts, Sue A - (suer) wrote: >> How about calculating the maps using a larger grid size? You'll lose some >> detail, but if you're looking at 120 A slabs you're probably not looking at >> individual atoms/residues anyway. I'm not sure if you can do that in coot >> or whether you need to calculate the map using ccp4 (or some other program) >> and read in the map. >> >> Sue >> >> On Dec 5, 2013, at 11:16 AM, Francis Reyes wrote: >> >>> Hi all >>> >>> So I'm running into a case where I need to see maps for large radii (in >>> excess of 120A) and I'm thinking I need to move to bigger hardware than >>> this laptop. Essentially, I'm getting errors in malloc >>> >>> coot-real(85522,0xa062e1a8) malloc: *** mach_vm_map(size=1140850688) failed >>> (error code=3) >>> *** error: can't allocate region >>> *** set a breakpoint in malloc_error_break to debug >>> libc++abi.dylib: terminating with uncaught exception of type >>> std::bad_alloc: std::bad_alloc >>> /Applications/ccp4-6.4.0/bin/../coot.app/Contents/coot/bin/coot: line 251: >>> 85522 Abort trap: 6 $coot_real $@ >>> /Applications/ccp4-6.4.0/bin/../coot.app/Contents/coot/bin/coot: line 257: >>> /Applications/ccp4-6.4.0/bin/../coot.app/Contents/coot/bin/guile: No such >>> file or directory >>> >>> What should I look for in a higher end machine? More system memory? Video >>> memory? All of the above? >>> >>> Thanks >>> >>> F >> >> Dr. Sue A. Roberts >> Dept. of Chemistry and Biochemistry >> University of Arizona >> 1041 E. Lowell St., Tucson, AZ 85721 >> Phone: 520 621 8171 or 520 621 4168 >> [email protected] >> http://www.cbc.arizona.edu/xray or >> http://www.cbc.arizona.edu/facilities/x-ray_diffraction >> Dr. Sue A. Roberts Dept. of Chemistry and Biochemistry University of Arizona 1041 E. Lowell St., Tucson, AZ 85721 Phone: 520 621 8171 or 520 621 4168 [email protected] http://www.cbc.arizona.edu/xray or http://www.cbc.arizona.edu/facilities/x-ray_diffraction
