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Name

snapnear - find a particle nearest to a given point in a snapshot

Synopsis

snapnear [parameter=value]

Description

For a given set of body variables, display the phase space coordinates of the closest one matching.

Parameters

The following parameters are recognized in any order if the keyword is also given:
in=
Input file (snapshot) [???]
vals=
Values of the things to compare. The number of vals= must match the number of options= given
options=
Things to compare [x,y,z]
times=
Times to select snapshot [all]

Examples

Here is a contrived example of finding the last particle
   mkplummer - 100 seed=123 | snapnear - -0.65,-0.93,-1.81
   -0.654517 -0.925513 -1.80847 0.145817 -0.27767 0.298678 99 0.00654808
A possible future change: a better way would be to output a snapshot sorted by the distance. This way using snapmask(1NEMO) could also be used to select the most nearby, or for example the 10 most nearby and average their properties, etc.
   snapnear snap - 0,0,0 | snapprint - | head -4

Caveat

See Also

snapprint(1NEMO) , snapmask(1NEMO) , snapshot(5NEMO)

Files

Author

Peter Teuben

Update History


22-Jul-20    V0.1 Drafted        PJT


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