Re: [ferret_users] 4 days average

Dear Nitin,

I believe you can do this by:

1. creating a new, daily time axis covering the 60-day period of your data

2. regridding your data to the new time axis using the @ave transformation

To create a new time axis, see "define axis" command:

http://ferret.pmel.noaa.gov/Ferret/documentation/users-guide/commands-reference/DEFINE#_VPINDEXENTRY_1299

To regrid your data using @ave transformation, see "regridding transformation" documentation section:

http://ferret.pmel.noaa.gov/Ferret/documentation/users-guide/Grids-Regions/GRIDS#_VPID_198

Your final command sequence must look like this:

DEFINE AXIS/t=<your daily time range>/units=days newt

LET daily_var = old_var[gt=newt@AVE]

This shall give you a daily-averaged 60-day time series (l=60) regrid of your variable.

Hope it help.

Kind regards,

Paulo Santiago

2014-09-08 5:47 GMT-03:00 Nitin Patil <nitinpatil85@xxxxxxxxx>:

Dear Ferret users,

I have netcdf file contains daily data at 4 different hrs for 60 days (i.e time steps becomes l=240).

I have to mean the 4 different hrs and get the daily mean for 60 days extracted. Can anyone did this before kindly let me know.

--
Regards,
Nitin Patil

Paulo Santiago

Ph.D. student in Meteorology

Brazilian National Institute for Space Research

Phone +55 (12) 3186 8637