splitcorrection(1) General Commands Manual splitcorrection(1) NAME splitcorrection - Produce multiple command files for running ctfphase- flip in parallel SYNOPSIS splitcorrection [options] ctfphaseflip_command_file DESCRIPTION splitcorrection is a Python script that will take a command file for running the ctfphaseflip program and produce multiple command files that can be run in parallel by Processchunks. The only argument that the typical user needs to give is -m to specify the number of views to be processed by each chunk. The default value is printed out by the program's usage statement. Thus, a typical com- mand might be splitcorrection -m 6 correction.com After giving this command, there will be a series of command files cor- rection-nnn.com to compute the chunks, a file correction-start.com, and a file correction-finish.com to finish the task and clean up intermedi- ate files. One can then enter processchunks machine_list correction where "machine_list" is the comma-separated list of machines to use, the number of processors to use on a single machine. OPTIONS When the program is invoked with no arguments, it gives a usage state- ment that shows the default values for these options. -m value Set the number of views to be processed per chunk to the given value (the default is 5 ). -b value Number of pixels at each boundary between chunks to save in sep- arate boundary files (named setname-nnn.cbound) and rewrite to the output file in the -finish.com file. The default is 2048. FILES The finishing command file deletes all the command and log files for the chunks after collecting minimun, maximum, and mean density informa- tion from the log files. AUTHOR David Mastronarde <mast at colorado dot edu> SEE ALSO processchunks, ctfphaseflip splitcorrection(1)