[ncl-talk] Fwd: Plot grid values

[Rabah Hachelaf]

Hi Mary,

I succeeded plot wind barb without any problem using "gsn_csm_vector_map"
function, now it remains just plot grid values.
Sorry for that but on this page
http://www.ncl.ucar.edu/Applications/weather_sym.shtml*, i* can't find any
function or a clear example who plot gridded values.

Thanks for help.




2014-07-24 16:27 GMT-04:00 Mary Haley <haley at ucar.edu>:

> Did you see our wind barb page:
>
> http://www.ncl.ucar.edu/Applications/barb.shtml
>
> This should work for gridded data which is either on a rectilinear grid,
> and hence has coordinate arrays attached to the U and V variables, or on a
> curvilinear grid, in which you have two-dimensional coordinate arrays for
> the X and Y (or lat/lon) dimensions.
>
> If you have a curvilinear grid that's over a map, then you will need to
> attach the 2D lat/lon arrays to your u and v variables via the special
> lat2d and lon2d attributes before you plot:
>
>       u at lat2d = f->lat
>       u at lon2d = f->lon
>       v at lat2d = f->lat
>       v at lon2d = f->lon
>
> The above code snippet will have to be changed, of course, to match
> whatever the lat/lon variables are called on your file.
>
> If you are not drawing wind barbs over a map, then you need to provide the
> 2D coordinates via the vfXArray and vfYArrays.  See the "meteo_1.ncl"
> example at:
>
> https://www.ncl.ucar.edu/Applications/meteo.shtml
>
>
> You will have to add the text strings yourself, though, probably via calls
> to gsn_add_text.
>
> --Mary
>
>
> On Thu, Jul 24, 2014 at 12:46 PM, Rabah Hachelaf <hachelaf at sca.uqam.ca>
> wrote:
>
>> Hi,
>>
>> Examples in the link are for plot station data, but in may case i have
>> gridded data (gfs data).
>> Does plot station data work for gridded data also.
>> Can you suggest me a simple script to plot a variable values.
>>
>> Thanks
>>
>>
>> 2014-07-24 11:32 GMT-04:00 Mary Haley <haley at ucar.edu>:
>>
>> Please see this page of examples:
>>>
>>> http://www.ncl.ucar.edu/Applications/weather_sym.shtml
>>>
>>> --Mary
>>>
>>>
>>>
>>> On Wed, Jul 23, 2014 at 4:43 PM, Rabah Hachelaf <hachelaf at sca.uqam.ca>
>>> wrote:
>>>
>>>> Hi All,
>>>>
>>>> I need an example ncl script how i can plot grid data values
>>>> (temperature for example) like the map attached.
>>>> Thanks.
>>>> --
>>>> ------------------------------
>>>> Cordialement,
>>>> Best regards,
>>>> Rabah Hachelaf
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> ncl-talk mailing list
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>>>>
>>>>
>>>
>>
>>
>> --
>> ------------------------------
>> Cordialement,
>> Best regards,
>> Rabah Hachelaf
>>
>
>


-- 
------------------------------
Cordialement,
Best regards,
Rabah Hachelaf
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