[ncl-talk] Fwd: Adding additional dimensions to an existing variable

[Zachary Suriano]

Thank you for the response. I will try and explain more clearly what I am
looking to achieve.

I would like to take my variable from x(time,lat,lon), where time is in
"days since YYYY-MM-DD", and make the variable be:
x(year,month,day,lat,lon), where year, month and day are their own
dimensions.

Ultimately I would like to pull out data from each month individually with
a statement such as: dec=x( : , 12 , : , : , : ). With leap days present
within the dataset, I cannot figure out a way to achieve this without
having year, month, day being their own dimensions.

Hopefully this is more clear.
Thanks!
Zac
---------- Forwarded message ----------
From: Dennis Shea <shea at ucar.edu>
Date: Tue, Jun 9, 2015 at 11:11 PM
Subject: Re: [ncl-talk] Adding additional dimensions to an existing variable
To: Zachary Suriano <zsuriano at udel.edu>


This is offline.

I am not sure of the question. It may be misleading

"Adding additional dimensions to an existing variable"

To me and I suspect others ... adding extra dimensions woylmean


   x(time,lat,lon)   ; 3D

Addin a fimension might be


    x(ncase,time,lat,lon)   ; 4D


or, even,


   x(ncase,time,level,lat,lon)  ; 5D



===================================


Adding extra **variables**


  x(time,lat,lon)


   date(time)    ; (say) yyyymmdd

   datesec(time)  ; seconds into current date


   yyyy(time)

   month(time)

  day(time)

   hour(time)


Is this what you meant????


Please respond to ncl-talk only ...I get way too much email.

====================


You can use


f = addfile(..., "w")


  f->date = date


etc


Make a copy of the file for testing purposes.


*ALWAYS* include what version of NCL u r using


ncl -V


Again ... ncl-talk  only and please do not address me directly


Just make a post


Good luck










On Tue, Jun 9, 2015 at 1:25 PM, Zachary Suriano <zsuriano at udel.edu> wrote:

> Hello,
>
> I have a question regarding a ncl script I am writing. I have searched
> through the manual and online forums and have come back empty handed.
>
> I have a file of daily snow depth changes (time,lat,lon) and would like to
> add additional dimensions to the variable. Time is in "days since ..."
> format and I would like to add (in the form of additional dimensions) the
> year, month, day that correspond to the time stamp while keeping the
> original time dimension the same. This way I can quickly and easily filter
> the data by month/etc later on without having to worry about leap years
> messing with the indexing.
>
> I have the year/month/day arrays already generated from "calendar_decode2"
> but when I try to add/merge them I keep running into issues. Any
> suggestions or solutions would be very much appreciated.
>
> Thank you,
>
> Zac Suriano
>
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