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snapkinem - compute kinematic diagnostics for snapshot
snapkinem
in=snap_file [parameter=value] ...
snapkinem computes various kinematic
diagnostics from the input N-body snapshot. These include the center of
mass position and velocity, angular momentum about the center of mass,
moment of inertia tensor, and kinetic energy tensor. An arbitrary weighting
may be specified for each particle.
The following parameters are
recognized.
- in=snap_file
- Input data is read from snap_file, which must be
in snapshot(5NEMO)
format. Default: required.
- weight=body_weight
- Expression
used to compute the weight of each body. See bodytrans(1NEMO)
for the form
of body_weight. Default: 1.0.
- rcut=cutoff_radius
- If cutoff_radius is greater
than zero, only particles within cutoff_radius of the body_weighted centroid
will be used to compute the final diagnostics. Default: 0.0.
- times=time_range
- Only frames within time_range will be analyzed. Default: all.
snapinert(1NEMO)
,
snaprect(1NEMO)
, snapplot(1NEMO)
, snapshot(5NEMO)
Joshua E. Barnes.
5-mar-89 V1.2 JEB
2-may-92 V1.3: helpvec/usage for new NEMO PJT
11-jun-92 V2.0: angular momentum as r.v, not v.r PJT
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