[GRASS-dev] [GRASS GIS] #2376: Add p-value for regression slope in r series

GRASS GIS trac at osgeo.org
Wed Jul 30 10:00:46 PDT 2014

#2376: Add p-value for regression slope in r series
 Reporter:  mastho                        |       Owner:  grass-dev@…              
     Type:  enhancement                   |      Status:  new                      
 Priority:  normal                        |   Milestone:  7.0.0                    
Component:  Raster                        |     Version:  svn-releasebranch70      
 Keywords:  r.series, p-value regression  |    Platform:  Unspecified              
      Cpu:  Unspecified                   |  
Changes (by pvanbosgeo):

 * cc: pvanbosgeo (added)


 You can calculate the p-value using the scipy library (from
 from-t-statistic). For example, if tt is the t value

 import scipy.stats as stats
 import numpy as np
 tt = 2.4
 n = 10
 pval = stats.t.sf(np.abs(tt), n-1)*2  (two-sided p-value)

 Perhaps this can be used either to create a script or in r.series?

Ticket URL: <https://trac.osgeo.org/grass/ticket/2376#comment:2>
GRASS GIS <http://grass.osgeo.org>

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