[ncl-talk] usage of "continue" [SEC=UNOFFICIAL]

[Jack Ogaja]

Thanks for the corrections and pointing out the misleading syntax I wrote.

Jack

> On 27 Oct 2015, at 19:59, Dennis Shea <shea at ucar.edu> wrote:
> 
> YES!!!!    'break' ... sorry!!!!  THX
> 
> 
> do i=0,10
>   do j=0,20
>      If(a(i).eq.b(j)) then
>          X = j
>          break    ; exit 'j' loop; go to 1st statement after the end
> of the 'j' loop
>       end if
>   end do         ; end 'j' loop
> end do            ; end 'i' loop
> 
> The above 'break' will jump to
> end do           ; end 'i' loop
> 
> 
> On Tue, Oct 27, 2015 at 12:48 PM, David Brown <dbrown at ucar.edu> wrote:
>> Hi Dennis,
>> Don't you mean "break" rather than "exit"? "exit" would quit the whole script.
>> -dave
>> 
>> 
>> On Tue, Oct 27, 2015 at 12:38 PM, Dennis Shea <shea at ucar.edu> wrote:
>>> Actually,
>>> 
>>>   i+=1
>>> 
>>> is not NCL legal.
>>> 
>>> ===
>>> 
>>> This code is certainly not NCL ...
>>> 
>>> Do i=0,10
>>>   Do j=0,20
>>>      If(a(i).eq.b(j)) then
>>>          X = j
>>>          Go to 333
>>>       End if
>>>   End do
>>> 333 continue
>>> End do
>>> 
>>> BUT
>>> 
>>> do i=0,10
>>>   do j=0,20
>>>      If(a(i).eq.b(j)) then
>>>          X = j
>>>          exit        ; exit 'j' loop
>>>       end if
>>>   end do         ; end 'j' loop
>>> end do            ; end 'i' loop
>>> 
>>> The above 'exit' will jump to
>>> end do           ; end 'i' loop
>>> 
>>> On Tue, Oct 27, 2015 at 5:42 AM, Jack Ogaja <jack.ogaja at gmail.com> wrote:
>>>> Hi Eunpa,
>>>> 
>>>> In this case “continue” is a terminal statement. I suppose in ncl you would
>>>> substitute that with a “while loop” syntax. For example
>>>> 
>>>> ;———
>>>> i = 0
>>>> do j = n, m
>>>>     do while ( i .lt. j)
>>>>           X=j
>>>>           i+=1
>>>>    end do
>>>> end do
>>>> ;———
>>>> 
>>>> see: http://www.ncl.ucar.edu/Document/Language/loops.shtml
>>>> 
>>>> Jack
>>>> 
>>>> 
>>>> 
>>>> On 27 Oct 2015, at 12:15, Eun-Pa Lim <E.Lim at bom.gov.au> wrote:
>>>> 
>>>> Dear Jack
>>>> 
>>>> 
>>>> 
>>>> Thanks for your reply J
>>>> 
>>>> 
>>>> 
>>>> I was just trying to make very simple do loops looking like this in old
>>>> fortran
>>>> 
>>>> 
>>>> 
>>>> Do i=0,10
>>>> 
>>>>   Do j=0,20
>>>> 
>>>>      If(a(i).eq.b(j)) then
>>>> 
>>>>          X = j
>>>> 
>>>>          Go to 333
>>>> 
>>>>       End if
>>>> 
>>>>   End do
>>>> 
>>>> 333 continue
>>>> 
>>>> End do
>>>> 
>>>> 
>>>> 
>>>> But "Go to " is not a statement used in NCL, and there is not much
>>>> explanation about "continue" in the NCL page.
>>>> 
>>>> 
>>>> 
>>>> There must be a way to do this in NCL I reckon!
>>>> 
>>>> 
>>>> 
>>>> Cheers
>>>> 
>>>> 
>>>> 
>>>> Eunpa
>>>> 
>>>> 
>>>> 
>>>> Eun-Pa Lim
>>>> 
>>>> Research Scientist
>>>> 
>>>> Seasonal Prediction Science Team
>>>> 
>>>> Centre for Australian Weather and Climate Research (CAWCR)
>>>> 
>>>> Bureau of Meteorology
>>>> 
>>>> Tel: +61-3-9669-4636
>>>> 
>>>> http://www.cawcr.gov.au/staff/elim/index.php
>>>> 
>>>> 
>>>> 
>>>> From: Jack Ogaja [mailto:jack.ogaja at gmail.com]
>>>> Sent: Tuesday, 27 October 2015 10:10 PM
>>>> To: Eun-Pa Lim
>>>> Cc: ncl-talk at ucar.edu
>>>> Subject: Re: [ncl-talk] usage of "continue" [SEC=UNOFFICIAL]
>>>> 
>>>> 
>>>> 
>>>> Really…? I guess it will be easier if you show a piece of ncl script which
>>>> gives a hint of what you are trying to achieve. In principle if you
>>>> understand what “continue” means/does in ‘your preferred' language, then I
>>>> assume you should be able to implement or know whether it is possible to
>>>> implement a similar algorithm in ncl after reading the ncl-statements
>>>> documentation and probably going through a few examples.
>>>> 
>>>> 
>>>> 
>>>> Or you can just provide a Pseudocode of your intended program to make it
>>>> easier for somebody to help.
>>>> 
>>>> 
>>>> 
>>>> Jack
>>>> 
>>>> 
>>>> 
>>>> On 27 Oct 2015, at 11:12, Eun-Pa Lim <E.Lim at bom.gov.au> wrote:
>>>> 
>>>> 
>>>> 
>>>> Hi NCL users,
>>>> 
>>>> 
>>>> 
>>>> Could anybody please teach me how to use "continue" in a do loop in NCL? I
>>>> can't find an example in
>>>> https://www.ncl.ucar.edu/Document/Manuals/Ref_Manual/NclStatements.shtml
>>>> 
>>>> 
>>>> 
>>>> Many thanks!
>>>> 
>>>> 
>>>> 
>>>> Eunpa
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> Eun-Pa Lim
>>>> 
>>>> Research Scientist
>>>> 
>>>> Seasonal Prediction Science Team
>>>> 
>>>> Centre for Australian Weather and Climate Research (CAWCR)
>>>> 
>>>> Bureau of Meteorology
>>>> 
>>>> Tel: +61-3-9669-4636
>>>> 
>>>> http://www.cawcr.gov.au/staff/elim/index.php
>>>> 
>>>> 
>>>> 
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>>>> 
>>>> 
>>>> 
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