[GRASS-dev] Re: [GRASS GIS] #474: r.quantile: segfaults with percentile=100

GRASS GIS trac at osgeo.org
Wed Feb 11 05:21:46 EST 2009


#474: r.quantile: segfaults with percentile=100
---------------------+------------------------------------------------------
  Reporter:  hamish  |       Owner:  grass-dev at lists.osgeo.org
      Type:  defect  |      Status:  closed                   
  Priority:  major   |   Milestone:  6.4.0                    
 Component:  Raster  |     Version:  svn-develbranch6         
Resolution:  fixed   |    Keywords:  r.quantile               
  Platform:  Linux   |         Cpu:  x86-32                   
---------------------+------------------------------------------------------
Comment (by glynn):

 Replying to [comment:4 hamish]:

 > I notice that if you do 'quant=3' you only get 2 results, and 'quant=1'
 gives no output. (all others do the same, report n-1)
 >
 > Is this intended because 3 bins will have two separators (at 33% and
 66%), or is it a bug?

 It's intended so that quant=N gives "N-tiles", e.g. quant=4 gives
 quartiles, quant=10 gives deciles, etc. AIUI, the convention is not to
 include the endpoints, e.g. "quartiles" are given as 25%, 50%, and 75%.

-- 
Ticket URL: <https://trac.osgeo.org/grass/ticket/474#comment:5>
GRASS GIS <http://grass.osgeo.org>


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