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stoa, stoa_sp - convert structured binary N-body file to ascii format
stoa in=snap_file out=ascii_file [parameter=value] ...
stoa
converts a structured binary file containing one or more N-body frames into
an ascii format. Most commonly, stoa is used to generate input files for
remote supercomputers. stoa_sp is similar, but uses single precision.
Snapshots
which contain diagnostics are ignored.
Another alternative to printing out
an ASCII list of body variables is snapprint(1NEMO)
.
The following
parameters are recognized.
- in=snap_file
- Input data is read from snap_file,
which must be in snapshot(5NEMO)
format. Default: none.
- out=ascii_file
- Converted output data is written to ascii_file. Default: none.
- options=option_list
- Specifies what data are written to output file; currently one or more of
mass, phase, or phi. Default: mass,phase.
- iformat=format_string
- Specify
output format for integers. Note the extra space in front of the format.
Default: %d.
- rformat=format_string
- Specify output format for real numbers.
Note the extra space in front of the format. Default: %21.13E.
The ascii output file will have the following format:
NOBJ number of particles [integer]
NDIM number of dimensions [integer]
TIME time of snapshot [real]
MASS(i) particle masses, i = 1...NOBJ [real]
. . . . .
X(i) Y(i) Z(i) particle positions, i = 1...NOBJ [real]
. . . . .
U(i) V(i) W(i) particle velocities, i = 1...NOBJ [real]
. . . . .
PSI(i) particle potentials, i = 1...NOBJ [real]
. . . . .
Note that the masses, phase-space coordinates, and potentials are all optional,
enabled by the options parameter. This format may be repeated until end-of-file.
atos(1NEMO)
, rsf(1NEMO)
, tsf(1NEMO)
, snapprint(1NEMO)
, filestruct(3NEMO)
,
snapshot(5NEMO)
.
Joshua E. Barnes, Peter Teuben
7-Apr-87 V 1.0: created PJT
11-May-88 V 2.0: created JEB
9-nov-92 V2.3 make it skip diagnostics PJT
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