[ferret_users] how calculate real Median 3D

[francoise orain <francoise.orain@xxxxxxxx>]

Hello



I need a median (Quantile0.5) like average on a time series (in a concatenate file netcdf ) lat lon day

• I succeed for mean I use average AVG

use analyse.nc
 name     title                             I         J         K         L
 ANALYSED_SST
          analysed sea surface temperatur  1:1251    1:601     ...       1:30

let MOY=ANALYSED_SST[L=0:30@AVE]
shade MOY

• BUT not for MEDIAN

let MEDIAN=ANALYSED_SST[L=0:30@MED]
shade/l=6 MEDIAN (because need a 2D field)

I wanted to do the same thing with @MED but I realize that  it is not a median (statistic sense ) but a smoother on one time
I shoud want a real median on the period for every points like average AVG (gif joined)

• My question is : is there a way to have this median or quantile 90 with ferret  for a 3D file or I have to use an another graphical tool

thanks a lot

Françoise Orain

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