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snapcopy - copy particles of snapshot subject to conditions
snapcopy
in=in_file out=out_file [parameter=value] ...
snapcopy copies an
N-body system from in to out, subjecting the individual particles to certain
conditions.
It should be noted that there are a variety of other programs
which can perform copy functions under better circumstances. snapsort will
rearrange the order of the particles in the file, after which a number
of them can be trimmed of using either snapmask or snapsample. The program
snapplotedit is an interactive editor, which allows the user to edit snapshots
using polygonic areas in 2D projections of 6D-phase space using the snapplot-interface.
It requires a special version of yapp(3NEMO)
, which may not be implemented
on all systems.
The following parameters are recognized:
- in=in_file
- input file, in snapshot(5NEMO)
format. [Default: none.]
- out=out_file
- output
file, also snapshot format. [Default: none.]
- select=select-string
- expression
which evaluates to an integer, only particles with non-zero expression will
be copied to the output file. The ranking of the particles is copied to
the Key array in the snapshot if not all particles were selected. The default
is all particles will be copied. [default: 1].
- times=time-ranges
- Only snapshots
with time values within times-ranges, which is of the form ts[:te],..., will
be copied. [default: all].
- precision=double|single
- Precision of variables
to be stored. The default for snapshots is double (double precision), but
many snapshot programs now recognize data in single precision format. [default:
double]. *** This option is not implemented yet ***
- keep=items-list
- List
of items to keep in the snapshot. The list may contain any of time,mass,phase,phi,acc,aux
and key.
snapsort(1NEMO)
, snapmask(1NEMO)
, snapplotedit(5NEMO)
Peter
Teuben
~/src/pjt/nbody snapcopy.1
12-apr-87 V1.0: document created PJT
26-sep-89 V1.1: debugged and exported to NEMO PJT
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