Re: obtain values of a single contour

Hi Dave,
I put the script plot_davetest.ncl and input data file davetest.nc in the incoming area. I tried it under both 6.1.1 and 6.1.2 with same error.

uname -a
Linux dcc 2.6.18-348.3.1.el5 #1 SMP Mon Mar 11 19:39:25 EDT 2013 x86_64 x86_64 x86_64 GNU/Linux

Regards,
Mark.
On 17/04/2013, at 5:57 AM, David Brown <dbrown@ucar.edu> wrote:

> Hi Mark,
> I'm sorry to hear you are having problems with this routine. I just ran a test using the plot value returned from
> gsn_csm_contour as the input to get_isolines pretty much as you have it here. It ran without problems. I tried it both
> with my development version of NCL on my mac and on our cluster using the release version of 6.1.2.
>
> I would be happy to take a look at your code (and sufficient data to get it to run) to see if there is some other factor
> coming into play here. I think you know the upload routine but just in case for reference it is detailed at http://www.ncl.ucar.edu/report_bug.shtml.
> -dave
>
>
> On Apr 15, 2013, at 10:44 PM, <Mark.Collier@csiro.au> wrote:
>
>> Hi Dave,
>> the interface looked simple enough but my best attempt gave:
>>
>> fatal:NhlGetIsoLines: invalid contourplot id
>> fatal:NhlGetIsolines: error retrieving isolines
>> fatal:["Execute.c":8128]:Execute: Error occurred at or near line 251 in file plot_tropoh_climdiff.ncl
>>
>> what I tried was:
>>
>> plot0=gsn_csm_contour(wks,clim1_hist_ea,conres2)
>>
>> isolines = get_isolines(plot0,(/2.0/))
>>
>> where plot0 renders normally, and it contains the 2.0 contour level.
>>
>> I'm using version 6.1.2
>>
>> Thanks,
>> Mark.
>> ________________________________________
>> From: David Brown [dbrown@ucar.edu]
>> Sent: Tuesday, 16 April 2013 4:01 AM
>> To: Collier, Mark (CMAR, Aspendale)
>> Cc: ncl-talk@ucar.edu
>> Subject: Re: obtain values of a single contour
>>
>> Hi Mark,
>> I recently created a function that will do what you want. It is available in NCL 6.1.1 and later. Check out:
>>
>> http://www.ncl.ucar.edu/Document/Functions/Built-in/get_isolines.shtml
>>
>> -dave
>>
>>
>> On Apr 15, 2013, at 12:41 AM, <Mark.Collier@csiro.au> wrote:
>>
>>> Hi,
>>> I plot a single unique contour of a 2d array using @cnLevels = val using the gsn_csm_contour function.
>>>
>>> is there a way of obtaining the x-y values of that line from the plot?
>>>
>>> Regards,
>>> Mark.
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Received on Tue Apr 16 18:09:35 2013