Re: daily mean

Hi Sahana,

I would use the function runave:
http://www.ncl.ucar.edu/Document/Functions/Built-in/runave.shtml

arr is an array with dimensions time (365*12), lat (73), lon (144)

temp = runave(arr(lat|:,lon|:,time|:),4,0)
arr2 = arr(lat|:,lon|:,time|1::4) ; create new array to keep
                                        ; coord variable info
arr2 = (/ temp(:,:,1::4) /) ; grab the 1st timestep and then
                                ; every 4th timestep
delete(arr)
delete(temp)

 From the runave documentation:
If the number of weights is even, the filter's center falls between
series elements; in this case, the center is shifted one-half of a time
increment towards the latter element.

You need a 4 timestep running average, so the average of the four
timesteps will be placed in the 1st element, and then every 4th timestep
after that.

Good luck.
Adam

sahana_paul wrote:
> Hi,
> I have 6 hourly data for a month. I want to get daily mean of
> each day at each grid point. What is the function I can use.
>
> regards
>
> sahana
>
>
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Adam Phillips			             asphilli_at_ucar.edu
National Center for Atmospheric Research   tel: (303) 497-1726
ESSL/CGD/CAS                               fax: (303) 497-1333
P.O. Box 3000				
Boulder, CO 80307-3000	  http://www.cgd.ucar.edu/cas/asphilli
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