[ncl-talk] Wondering Why I Get This Error

[Barry Lynn]

Okay, will do.

On Fri, Sep 8, 2017 at 11:53 AM, Guido Cioni <guidocioni at gmail.com> wrote:

> You can't convert fractional digit numbers to byte (see here
> https://www.ncl.ucar.edu/Document/Manuals/Ref_Manual/NclDataTypes.shtml).
> You would have to convert eveything to float (or double) and then compare
> again.
>
> On 8. Sep 2017, at 10:51, Barry Lynn <barry.h.lynn at gmail.com> wrote:
>
> So, then I need to convert 0.5 and 0.33 to byte values, I assume --
> regarding my last question.
>
> Thank you for clarifying.
>
> On Fri, Sep 8, 2017 at 11:48 AM, Guido Cioni <guidocioni at gmail.com> wrote:
>
>> dbz is byte type -> wrap_around thus is byte type.
>>
>> 256. will be a floating point variable. In fortran, and thus NCL, if you
>> write 256 you will get an integer variable, 256. (with the point) a float
>> variable.
>>
>> Thus when making wrap_around=256. you are forcing an assignment between
>> byte and float type, which NCL cannot do without spitting out a warning or
>> and error. Imagine if this would happen without noticing...it could lead to
>> all sort of weird errors.
>>
>> You have to convert wrap_around to float (for example with the function
>> tofloat) before attempting that.
>> Cheers
>>
>> On 8. Sep 2017, at 10:11, Barry Lynn <barry.h.lynn at gmail.com> wrote:
>>
>> Hi:
>>
>> I have some simple code, copied below.
>>
>> I cannot add the value of 256 to dbz or the value of wrap_around after
>> setting it to 256.
>>
>>   wrap_around = dbz
>>
>>   wrap_around = 256.
>>
>>
>>   do j = 0,dims2d(0)-1
>>
>>   do i = 0,dims2d(1)-1
>>
>>   check = ismissing(dbz(j,i))
>>
>>    if (check.eq.False)then
>>
>>    if (dbz(j,i).lt.0)then
>>
>>     dbz(j,i) = dbz(j,i) + wrap_around(j,i)
>>
>>    end if
>>
>>    end if
>>
>>   end do
>>
>>   end do
>>
>> fatal:["NclVar.c":1390]:Assignment type mismatch, right hand side can't
>> be coerced to type of left hand side
>>
>> fatal:["Execute.c":8575]:Execute: Error occurred at or near line 35 in
>> file ./ra
>> PrintVarSummary gives:
>>
>> Variable: dbz
>>
>> Type: byte
>>
>> Total Size: 480960 bytes
>>
>>             480960 values
>>
>> Number of Dimensions: 2
>>
>> Dimensions and sizes: [radialR | 360] x [gateR | 1336]
>>
>> Coordinates:
>>
>> Number Of Attributes: 14
>>
>>   units : dBz
>>
>>   long_name : Reflectivity
>>
>>   missing_value : 0
>>
>>   signal_below_threshold : 0
>>
>>   scale_factor : 0.5
>>
>>   add_offset : -33
>>
>>   _Unsigned : true
>>
>>   range_folding_threshold : 50
>>
>>   _CoordinateAxes : timeR elevationR azimuthR distanceR
>>
>>   scale_factor_metadata : 0.5
>>
>>   add_offset_metadata : -33
>>
>>   range_folded_value_packed : 1
>>
>>   range_folded_value : -32.5
>>
>>   _FillValue : 0
>> --
>> Barry H. Lynn, Ph.D
>> Senior Lecturer,
>> The Institute of the Earth Science,
>> The Hebrew University of Jerusalem,
>> Givat Ram, Jerusalem 91904, Israel
>> Tel: 972 547 231 170
>> Fax: (972)-25662581
>>
>> C.E.O, Weather It Is, LTD
>> Weather and Climate Focus
>> http://weather-it-is.com
>> Jerusalem, Israel
>> Local: 02 930 9525
>> Cell: 054 7 231 170
>> Int-IS: x972 2 930 9525
>> US 914 432 3108 <(914)%20432-3108>
>> _______________________________________________
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>>
>>
>>
>> Guido Cioni
>> http://guidocioni.altervista.org
>>
>>
>
>
> --
> Barry H. Lynn, Ph.D
> Senior Lecturer,
> The Institute of the Earth Science,
> The Hebrew University of Jerusalem,
> Givat Ram, Jerusalem 91904, Israel
> Tel: 972 547 231 170
> Fax: (972)-25662581
>
> C.E.O, Weather It Is, LTD
> Weather and Climate Focus
> http://weather-it-is.com
> Jerusalem, Israel
> Local: 02 930 9525
> Cell: 054 7 231 170
> Int-IS: x972 2 930 9525
> US 914 432 3108 <(914)%20432-3108>
>
>
>
> Guido Cioni
> http://guidocioni.altervista.org
>
>


-- 
Barry H. Lynn, Ph.D
Senior Lecturer,
The Institute of the Earth Science,
The Hebrew University of Jerusalem,
Givat Ram, Jerusalem 91904, Israel
Tel: 972 547 231 170
Fax: (972)-25662581

C.E.O, Weather It Is, LTD
Weather and Climate Focus
http://weather-it-is.com
Jerusalem, Israel
Local: 02 930 9525
Cell: 054 7 231 170
Int-IS: x972 2 930 9525
US 914 432 3108
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