[GRASS-dev] r.stats.quantile: does the 50th percentile equal to the median?

GRASS GRASS developer
1

Hi devs,

does the default `percentiles=50` in `r.stats.quantile` equal to the median?
Is the definition exclusive or inclusive?

Thank you for any insight, Nikos
--

See also
- https://en.wikipedia.org/wiki/Percentile
- https://math.stackexchange.com/q/2048470/445399

2

On Fri, Jan 22, 2021 at 2:51 PM <nik@nikosalexandris.net> wrote:

Hi devs,

does the default percentiles=50 in r.stats.quantile equal to the
median?
Is the definition exclusive or inclusive?

The median is commonly defined as the 50% percentile, the “middle” item of a sorted dataset. See
https://en.wikipedia.org/wiki/Median

In GRASS, calculations of the median and the 50% percentile are identical.

HTH,

Markus M

Thank you for any insight, Nikos

See also

grass-dev mailing list
grass-dev@lists.osgeo.org
https://lists.osgeo.org/mailman/listinfo/grass-dev

3

Thank you Markus!

On 2021-01-23 21:20, Markus Metz wrote:

On Fri, Jan 22, 2021 at 2:51 PM <nik@nikosalexandris.net> wrote:

Hi devs,

does the default percentiles=50 in r.stats.quantile equal to the
median?
Is the definition exclusive or inclusive?

The median is commonly defined as the 50% percentile, the “middle” item of a sorted dataset. See
https://en.wikipedia.org/wiki/Median

In GRASS, calculations of the median and the 50% percentile are identical.

HTH,

Markus M

Thank you for any insight, Nikos

See also

grass-dev mailing list
grass-dev@lists.osgeo.org
https://lists.osgeo.org/mailman/listinfo/grass-dev