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snapmstat - statistics of the masses in a snapshot
snapscale
in=in_file [parameter=value] ...
snapmstat runs through the masses
of a snapshot, in sequential order or sorted by mass, and reports in each
bin (to be defined later) how many stars there are and the total mass is
each bin.
A new bin is defined when its predecessor in the searching (either
sequential or sorted) has a different mass.
The output is suitable to be
parsed by awk(1)
or tabmath(1NEMO)
and can be used in snapmask(1NEMO)
to
select certain particles by mass. snapcopy can perhaps also be of some use.
The following parameters are recognized:
- in=in_file
- input file,
in snapshot(5NEMO)
format. Default: none.
- sort=t|f
- Should masses be sorted?
Although this keyword has not been implemented yet, it’s effect can be achieved
with snapsort. [default: f].
- species=maxspecies
- Maximum number of species
allowed. This keyword is also not used, since the current table is build
on the fly, and not saved. [default: 100].
The output of an SPH snapshot
could look like:
0 0:8191 = 8192 Mass= 3.4332e-06 TotMas= 0.0281248 CumMas= 0.0281248
1 8192:12287 = 4096 Mass= 1.5259e-05 TotMas= 0.0625009 CumMas= 0.0906256
2 12288:28671 = 16384 Mass= 9.7275e-06 TotMas= .159375 CumMas= .250001
3 28672:45055 = 16384 Mass= 6.1035e-05 TotMas= .999997 CumMas= 1.25
4 45056:49151 = 4096 Mass= 0.00015259 TotMas= .625009 CumMas= 1.87501
snapstat(1NEMO)
, snapprint(1NEMO)
, snapcopy(1NEMO)
Peter
Teuben
~/src/pjt/nbody snapmstat.c snapmstat.1
18-Sep-90 V1.0: created PJT
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