[ncl-talk] issue with wrf_user_ll_to_ij
Wang,Yu
wangyu8722 at ufl.edu
Mon Jan 30 13:58:51 MST 2017
Thank you so much for your help.
Best,
Yu
________________________________
From: ncl-talk-bounces at ucar.edu <ncl-talk-bounces at ucar.edu> on behalf of Bill Ladwig <ladwig at ucar.edu>
Sent: Tuesday, January 24, 2017 2:45:51 PM
To: Wang,Yu
Cc: NCL
Subject: Re: [ncl-talk] issue with wrf_user_ll_to_ij
Hi Yu,
There is a useTime value you can set in the opt argument. See:
http://www.ncl.ucar.edu/Document/Functions/WRF_arw/wrf_user_ll_to_ij.shtml
opt = True
opt at useTime = 2
Then pass this as the last argument to wrf_user_ll_to_ij.
Hope this helps,
Bill
On Jan 24, 2017 9:30 AM, "Wang,Yu" <wangyu8722 at ufl.edu<mailto:wangyu8722 at ufl.edu>> wrote:
To whom it may concern,
I am trying to use this function wrf_user_ll_to_ij on a moving nested domain but found things problematic for moving nested domains. Here is the prototype of this function:
function wrf_user_ll_to_ij (
file_handle : file or list [list added in V6.0.0],
lon : numeric,
lat : numeric,
opt : logical
)
The first statement is the file that needed to be handled. But for a nested domain output, each time step has a different domain region. Then how do we represent each time step for this first statement? For example. I have this file wrfout_d02_2005-08-20_18:00:00 which include 12-time steps . When I want to extract one certain point from all the time steps, how do I define the first statement?
For example, if
a = addfile("./wrfout_d02_2005-08-20_18:00:00.nc<http://00.nc>","r")
for i=0,11
wrf_user_ll_to_ij(a(i), lon, lat, True)
This way of extracting the ith time step of the output file is not correst. Then what should I do?
Thanks forany help.
Best,
Yu Wang
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