Re: missing values

From: Mateus da Silva Teixeira <mtex2k3_at_nyahnyahspammersnyahnyah>
Date: Wed, 28 Mar 2007 19:23:57 -0300

Dear NCL users,

Sorry, again!!!!
Just using delete(array@_FillValue) before setting another value to
_FillValue solve my problem!

Please, excuse-me for that!
Mateus

Mateus da Silva Teixeira escreveu:
> Dear NCL users,
>
> Sorry about my previous question, it was incomplete!!!!
> My precipitation data has as missing value -999.9.
> The problem mentioned in the previous e-mail occurs when there are
> missing data.
> So, when I change the _FillValue value, all the -999.9 are changed to
> the new _FillValue value.
> Because this that my counting isn't right!
> Is there a way to change _FillValue without change the data?
>
> Thanks
> Mateus
>
>
> Mateus da Silva Teixeira escreveu:
>> Dear NCL users,
>>
>> I have a 3D array dimensioned (year | 1960:2004, month | 1:12, day |
>> 1:31) in which I put precipitation data - I should do it because my
>> data source.
>> Because the array dimensionality, some fake days do appear, like Feb
>> 30 and April 31, for example.
>> So, in order to eliminate these fake days I substitute the data
>> _FillValue for another, like -1.0.
>> When I print the array for one year, the fake days appear correctly
>> marked with -1.0. I show to you the right end of the first year of
>> this array:
>>
>> 0.00 0.00 0.00 13.40 0.00 3.80 21.00
>> <- JANUARY
>> 0.00 0.00 0.00 32.00 -1.00 -1.00 -1.00
>> 7.20 4.40 3.40 7.00 0.00 0.00 0.00
>> 0.00 0.00 19.20 0.00 0.00 0.00 -1.00
>> 0.00 0.00 0.00 0.00 0.00 0.00 0.00
>> 0.00 0.00 8.40 0.00 7.20 0.00 -1.00
>> 0.00 0.00 0.00 0.00 0.00 0.00 0.00
>> 0.00 0.00 0.00 0.00 0.00 0.00 0.00
>> 30.40 0.00 0.00 0.00 0.00 0.00 -1.00
>> 0.00 0.00 0.00 0.00 0.00 0.00 0.00
>> 0.00 0.00 0.00 0.00 0.00 0.00 -1.00
>> 11.00 15.00 4.00 0.00 0.00 0.00 0.00
>> <- DECEMBER
>>
>> To eliminate these days, I transform these array to an 1D array and
>> find the indexes of the fake days, like below
>>
>> seriePluv = ndtooned(selPeriodo(0,:,:)) ; selPeriodo
>> is the 3D array, getting only the first year (the data showed above).
>> seriePluv@_FillValue = fakeDays_value ; fakeDays_value =
>> -1.0
>> print(num(ismissing(seriePluv))) ;
>> verifying the number of the fake days of the first year => should be 7
>>
>>
>> However, the result is completely strange: it returns 68 fake days
>> for this first year.
>> Am I doing something wrong?
>> I already try another values to mark the fake days, but nothing changed!
>>
>> Thanks
>> Mateus
>>
>> _______________________________________________
>> ncl-talk mailing list
>> ncl-talk_at_ucar.edu
>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>
>
>

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Received on Wed Mar 28 2007 - 16:23:57 MDT

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