median filter results in "ribbon" around raster

Discussion created by xabierr on Jul 17, 2013
Latest reply on Nov 22, 2019 by jlaguna-esristaff
When I run a median focal filter using a large circular neighbourhood area (approx. > 1/5 of raster extent) the result is a "ribbon" around the raster with an empty middle (nodata values). Not the case when running other stats. At what point does the calculation of the median returns Nodata and what would be the max. neighbourhood extent?