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add center of mass
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1 changed files with 12 additions and 2 deletions
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@ -425,8 +425,7 @@ class Clump:
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Returns
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-------
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m : 1-dimensional array
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Array of shape `(n_particles, )`.
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m : 1-dimensional array of shape `(n_particles, )`
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"""
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return self._m
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@ -437,6 +436,17 @@ class Clump:
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raise TypeError("`r` and `m` must be equal size 1-dim arrays.")
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self._m = m
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@property
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def center_mass(self):
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"""
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Clump center of mass.
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Returns
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-------
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cm : 1-dimensional array
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"""
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return numpy.average(self.pos, axis=0, weights=self.m)
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@property
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def index(self):
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"""
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