[ncl-talk] Problems with plotting Cyclone Track

Thu Jun 20 23:50:10 MDT 2019

Dear Respected Sir,

I have attached my files for you to check. They are not single time step
files. So what should I do now?
I am trying to plot the path of a depression that formed during that period
and moved over that area.
The script I am using is from the NCL's website.
As I have said before, I am a novice at this. That's why I am still at
wonder with these things.

https://drive.google.com/open?id=1Icu9p9hT6u7_zOzUEnDwEZH7-9NwH62i

Sincerely -

On Fri, 21 Jun 2019 at 04:14, Rick Brownrigg <brownrig at ucar.edu> wrote:

> Hi,
>
> Please reply to the ncl-talk group -- it provides a bigger resource for
> answering questions.
>
> I don't know much about WRF and what you are trying to do, but if all your
> WRF files are single time step files, and all you are tring to do with this
> line:
>
>     time(ifs) = wrf_user_list_times(f)
>
> is for each file capture that timestamp, then something like this might
> work:
>
>     time(ifs) = charactertostring(f->Times)
>
> The f->Times variable (which I believe is standard) is character, so it
> needs to be converted.
>
> I'll note that when I ran a test using wrf_user_list_times() on a
> single-time WRF file, it always produced a 1D array of dimension 2, which
> would be why you are getting the error: trying to assign a 2-element entity
> into a 1-element slot. Note that NCL requires the dimensionality *and*
> types of both sides of an assignment statement to match.
>
> Rick
>
> On Thu, Jun 20, 2019 at 4:27 PM Saurav Dey Shuvo <sauravshuvo007 at gmail.com>
> wrote:
>
>> Dear Respected Sir,
>>
>> Thank you for the clarification.
>> But I am very new at NCL, and still has minimal knowledge about it.
>> Could you please tell me what should I write to solve this problem?
>>
>> Sincerely -
>>
>> On Thu, 20 Jun 2019 at 21:26, Rick Brownrigg <brownrig at ucar.edu> wrote:
>>
>>> Hi,
>>>
>>> The error message is telling you exactly the problem -- the dimensions
>>> of the expression on the right hand side of an assignment must match the
>>> dimensions of the variable on the left. More specifically, line 61 in your
>>> script is:
>>>
>>>     time(ifs) = wrf_user_list_times(f)
>>>
>>> Time is a one dimension variable, declared as:
>>>
>>>      time = new(ndate,string)
>>>
>>> and wrf_user_list_time() returns an array of available times, so line 61
>>> is an attempt to assign an *element* of the time array to a 1D array of
>>> indeterminate length.
>>>
>>> Hope that helps...
>>> Rick
>>>
>>> On Wed, Jun 19, 2019 at 1:07 AM Saurav Dey Shuvo via ncl-talk <
>>> ncl-talk at ucar.edu> wrote:
>>>
>>>> Dear Respected Sir/Madam,
>>>> I am trying to plot a cyclone track. But I am getting this -
>>>>
>>>> ncl WRF_track_1.ncl
>>>>  Copyright (C) 1995-2017 - All Rights Reserved
>>>>  University Corporation for Atmospheric Research
>>>>  NCAR Command Language Version 6.4.0
>>>>  The use of this software is governed by a License Agreement.
>>>>  See http://www.ncl.ucar.edu/ for more details.
>>>> (0) Check input data:1 .ne. 8
>>>>
>>>>
>>>> Variable: times
>>>> Type: string
>>>> Total Size: 264 bytes
>>>>             33 values
>>>> Number of Dimensions: 1
>>>> Dimensions and sizes: [33]
>>>> Coordinates:
>>>> Number Of Attributes: 2
>>>>   description : times in file
>>>>   _FillValue : missing
>>>> (0) 2017-10-17_00:00:00
>>>> (1) 2017-10-17_03:00:00
>>>> (2) 2017-10-17_06:00:00
>>>> (3) 2017-10-17_09:00:00
>>>> (4) 2017-10-17_12:00:00
>>>> (5) 2017-10-17_15:00:00
>>>> (6) 2017-10-17_18:00:00
>>>> (7) 2017-10-17_21:00:00
>>>> (8) 2017-10-18_00:00:00
>>>> (9) 2017-10-18_03:00:00
>>>> (10) 2017-10-18_06:00:00
>>>> (11) 2017-10-18_09:00:00
>>>> (12) 2017-10-18_12:00:00
>>>> (13) 2017-10-18_15:00:00
>>>> (14) 2017-10-18_18:00:00
>>>> (15) 2017-10-18_21:00:00
>>>> (16) 2017-10-19_00:00:00
>>>> (17) 2017-10-19_03:00:00
>>>> (18) 2017-10-19_06:00:00
>>>> (19) 2017-10-19_09:00:00
>>>> (20) 2017-10-19_12:00:00
>>>> (21) 2017-10-19_15:00:00
>>>> (22) 2017-10-19_18:00:00
>>>> (23) 2017-10-19_21:00:00
>>>> (24) 2017-10-20_00:00:00
>>>> (25) 2017-10-20_03:00:00
>>>> (26) 2017-10-20_06:00:00
>>>> (27) 2017-10-20_09:00:00
>>>> (28) 2017-10-20_12:00:00
>>>> (29) 2017-10-20_15:00:00
>>>> (30) 2017-10-20_18:00:00
>>>> (31) 2017-10-20_21:00:00
>>>> (32) 2017-10-21_00:00:00
>>>> fatal:Dimension sizes on right hand side of assignment do not match
>>>> dimension sizes of left hand side
>>>> fatal:["Execute.c":8640]:Execute: Error occurred at or near line 61 in
>>>> file WRF_track_1.ncl
>>>>
>>>> Could you please help me in sorting out my problem.
>>>>
>>>> Sincerely -
>>>> --
>>>> Saurav Dey Shuvo
>>>> M.Sc. in Meteorology at Department of Meteorology, University of Dhaka
>>>> B.S. in Geography and Environment at Department of Geography and
>>>> Environment, University of Dhaka
>>>>
>>>> _______________________________________________
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>>>>
>>>
>>
>> --
>> Saurav Dey Shuvo
>> M.Sc. in Meteorology at Department of Meteorology, University of Dhaka
>> B.S. in Geography and Environment at Department of Geography and
>> Environment, University of Dhaka
>>
>>

-- 
Saurav Dey Shuvo
M.Sc. in Meteorology at Department of Meteorology, University of Dhaka
B.S. in Geography and Environment at Department of Geography and
Environment, University of Dhaka
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