clusterCentroid

Return to directory of Todd's CASA extensions

Reads a list of RA/Dec positions (and optionally the corresponding intensity) from a text file and computes the centroid, or intensity-weighted centroid.

Usage:

au.clusterCentroid(filename, xcol=0, ycol=1, zcol=None, delimiter=None, maxLines=None)
  • xcol: column containing RA in the format HH:MM:SS.S
  • ycol: column containing Dec in the format DD:MM:SS.S
  • zcol: optional column containing intensity (i.e. weight)
  • delimiter: column delimiter in the file
  • maxLines: max number of lines to be read from the file

Example:

File contains:
17:20:54.625 -35:45:08.75   1.0
17:20:54.622 -35:45:08.77   2.0
17:20:54.622 -35:45:08.81   21.0
17:20:54.622 -35:45:08.51   2.5
17:20:54.613 -35:45:08.60   3.0
17:20:54.618 -35:45:08.62   65.0

Command:
CASA <3>: au.clusterCentroid('ch3oh6.7ghz.py',zcol=2)
17:20:54.61899, -035:45:08.663227
  Out[3]: '17:20:54.61899, -035:45:08.663227'

-- ToddHunter - 2014-02-07
Topic revision: r1 - 2014-02-07, ToddHunter
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