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

[David Brown]

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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