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

Markus Neteler neteler at osgeo.org
Wed Jan 6 12:41:12 PST 2016

On Wed, Dec 30, 2015 at 12:17 PM, Helmut Kudrnovsky <hellik at web.de> wrote:
>>Like this you check if the difference is very small and below the
>>acceptable threshold.
>>In C, we use GRASS_EPSILON for these comparisons.
> now done with GRASS_EPSILON   1.0e-15
> r.mapcalc expression=difftestepsilon = if( abs( accum32bit at accumtest -
> accum64bit at accumtest) <= 1.0e-15, 1 , 100 )
> attached a screenshot of this map
> accum_diff_wingrass32bitvs64bit.png
> <http://osgeo-org.1560.x6.nabble.com/file/n5243286/accum_diff_wingrass32bitvs64bit.png>


Can you open a ticket with all relevant bits + the difference
screenshot along with a legend and "r.univar -e" output?


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