[ncl-talk] load scripts in multiple NCLfiles program

[franz]

thanks Dennis for a very clear answer.
   I was doing somethig like the following:

load “script_1.ncl”
load “script_2.ncl”
begin   ; MAIN

end

   I solved the problem changing the order of loading the script_1.ncl 
and script_2.ncl
in the main.ncl file because script_1 need function placed in script_2.

thanks
Francesco T.

On 28-11-2014 21:14, Dennis Shea wrote:
> It is likely, you are violating NCL's "scoping" rules which are
> similar to Pascal.
> 
> Compiled languages (eg: fortran, C, C++,..) use two steps: (1)
> compiling and (2) linking in the build process. Compiling translates
> codes into 'machine language' and results in independent object codes.
> Linking refers to the creation of a single executable file from
> multiple object files. Hence, the compiled program knows where
> assorted object files are located because of the link process.
> 
> NCL is an interpreted language like Matlab, Python.  Rather than
> compiled, the codes (scripts) are  interpreted. There is no
> conversion to machine code. There is no formal 'link' process.
> Generally, interpreted languages require a library or function be
> 'loaded' (ie, 'defined') prior to use. This is called the 'scope' of
> the code. The 'scope' also applies to variables. An example
> 
> load “dummy_1.ncl”      ; not aware of constants or codes
> below
> 
> GRAVITY        = 9.8
> 
> RGAS            = 204
> 
> load “dummy_2.ncl”      ; can use GRAVITY, RGAS &
> 'dummy_1.ncl'
> 
> REARTH        =  6371.009   ; km
> 
> load “dummy_3.ncl”      ; can use GRAVITY, RGAS, REARTH
> 
>                                           
> ; dummy_1,ncl, dummy_2.ncl
> 
> begin          ; MAIN          ; can use GRAVITY,
> RGAS, REARTH
> 
>                                          
> ; dummy_1,ncl, dummy_2.ncl, dummy_1.ncl
> 
>     :
> 
> end
> load “dummy_4.ncl”  ; can NOT be 'seen' by any of the above code
> so it
>                                ; can not
> be used
> 
> On Fri, Nov 28, 2014 at 8:30 AM, franz <f.trotta at sincem.unibo.it>
> wrote:
> 
>> Dear Ncl,
>>     I have written a multi file program in NCL,
>>     There is a main script  ‘main.ncl’ which is a entry
>> point of the code
>>     in this file I load external scripts (where there are several
>> utility
>> function/procdure. lets call script1.ncl and script2.ncl )
>> 
>>      I have a problem when in one of this external script
>> (script1.ncl) I
>> call a procedure
>>      which is defined in an other external script (scrip2.ncl)
>> 
>>      fatal:syntax error: line 196 in file ./script1.ncl before
>> or near n
>> 
>> tempe_myOc,saline_myOc,ssh_myOc,glAttr_description)
>> 
> --------------------------------------------------------------------------------^
>> 
>> fatal:syntax error: possibly an undefined procedure
>> 
>>      How can I solve this problem?
>> 
>> thanks
>> Francesco T.
>> _______________________________________________
>> ncl-talk mailing list
>> List instructions, subscriber options, unsubscribe:
>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk [1]
> 
> 
> 
> Links:
> ------
> [1] http://mailman.ucar.edu/mailman/listinfo/ncl-talk