[GRASS-dev] [GRASS GIS] #2854: results in winGRASS7 32bit vs 64bit: should they be identical?

[GRASS GIS]

#2854: results in winGRASS7 32bit vs 64bit: should they be identical?
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  Reporter:  hellik  |      Owner:  grass-dev@…
      Type:  defect  |     Status:  new
  Priority:  normal  |  Milestone:  7.0.3
 Component:  Raster  |    Version:  svn-releasebranch70
Resolution:          |   Keywords:
       CPU:  x86-64  |   Platform:  MSWindows 7
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Comment (by hellik):

 Replying to [comment:1 neteler]:
 > Please also add the "r.univar -e ..." output of
 >
 > {{{
 > r.mapcalc "difftestepsilon_values = if( abs( accum_wg32bit at watershedtest
 - accum_wg64bit at watershedtest  ) <= 1.0e-15 , 1 ,
 accum_wg32bit at watershedtest - accum_wg64bit at watershedtest )"
 > }}}
 >
 > to see the actual differences and not 100. Thanks.

 {{{
 r.mapcalc expression=difftestepsilon_values = if(abs(
 accum_wg32bit at watershedtest - accum_wg64bit at watershedtest  ) <= 1.0e-15, 1
 , accum_wg32bit at watershedtest - accum_wg64bit at watershedtest )
 }}}

 {{{
 r.univar -e map=difftestepsilon_values at watershedtest
 total null and non-null cells: 2025000
 total null cells: 0
 Of the non-null cells:
 ----------------------
 n: 2025000
 minimum: -8.14907e-010
 maximum: 1
 range: 1
 mean: 0.681817
 mean of absolute values: 0.681817
 standard deviation: 0.465771
 variance: 0.216942
 variation coefficient: 68.3131 %
 sum: 1380679.99999932
 1st quartile: 3.55271e-015
 median (even number of cells): 1
 3rd quartile: 1
 90th percentile: 1
 }}}

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Ticket URL: <https://trac.osgeo.org/grass/ticket/2854#comment:2>
GRASS GIS <https://grass.osgeo.org>