[gradsusr] Setting missing values (or any value) to undefined

[Jeff Duda]

To my knowledge, no.

I am perplexed as to why my proposed solution did not work. Is there any
chance you can let me poke around the data myself to see what's up? If not,
can I see the control file and commands you used?

Jeff

On Fri, Oct 30, 2015 at 11:58 AM, Matt Bunkers - WFO UNR <
matthew.bunkers at noaa.gov> wrote:

> Setting the UNDEF variable in the ctl file worked for me.  Still, I wonder
> if more than one UNDEF variable can be defined.
>
> -- Matt
>
>
> On Fri, Oct 30, 2015 at 10:40 AM, Matt Bunkers - WFO UNR <
> matthew.bunkers at noaa.gov> wrote:
>
>> The maskout(WC,WC+119.9) option didn't work.  I've tried playing with
>> different numbers but still get weird gradients.
>>
>> Can I include more than one value for the UNDEF variable in the ctl
>> file?  The documentation doesn't suggest so.
>>
>> Thanks,
>>
>> -- Matt
>>
>>
>> On Fri, Oct 30, 2015 at 10:14 AM, Goodson,Ron [Edm] <Ron.Goodson at ec.gc.ca
>> > wrote:
>>
>>> If this is the only data being analyzed .. then wouldn’t just setting
>>> UNDEF in the ctl file be even easier (though I’ll admit the maskout is way
>>> more flexible and necessary if you have a bunch of different variables that
>>> each use different missing values).
>>>
>>>
>>>
>>> *From:* gradsusr-bounces at gradsusr.org [mailto:
>>> gradsusr-bounces at gradsusr.org] *On Behalf Of *Jeff Duda
>>> *Sent:* October 30, 2015 9:46 AM
>>> *To:* GrADS Users Forum
>>> *Subject:* Re: [gradsusr] Setting missing values (or any value) to
>>> undefined
>>>
>>>
>>>
>>> maskout(WC,WC+119.9)
>>>
>>>
>>>
>>> On Fri, Oct 30, 2015 at 10:06 AM, Matt Bunkers - WFO UNR <
>>> matthew.bunkers at noaa.gov> wrote:
>>>
>>> Hi,
>>>
>>>
>>>
>>> I have hourly wind chill (WC) grids for which I want to find the minimum
>>> WC.  The problem I have is that some of the areas of the grids are missing
>>> (set to -120).  When I compute the minimum WC and then display the result
>>> (as either image or contour) I get huge gradients between the real data and
>>> the missing data.  What I would like to do is set my missing data to
>>> undefined (so they don't plot).  I've tried that with the const function
>>> but that doesn't appear to work.  Is there another function that would
>>> allow me to set a given value (-120 in this case) of my grid to undefined?
>>> If it is set to undefined then when I plot the grid I shouldn't see those
>>> horrendous gradients.
>>>
>>>
>>> Thanks,
>>>
>>>
>>>
>>> -- Matt
>>>
>>>
>>>
>>>
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>>>
>>>
>>>
>>>
>>> --
>>>
>>> Jeff Duda
>>> Graduate research assistant
>>> University of Oklahoma School of Meteorology
>>> Center for Analysis and Prediction of Storms
>>>
>>> _______________________________________________
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>>>
>>>
>>
>
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>


-- 
Jeff Duda
Graduate research assistant
University of Oklahoma School of Meteorology
Center for Analysis and Prediction of Storms
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