[ncl-talk] Remove white-spaces from write_table output

Barry Lynn barry.h.lynn at gmail.com
Fri Aug 11 08:36:45 MDT 2017 

Hi:

It sounds like you've found a solution, but one should mention that a
fortran write statement (using WRAPIT) is easy to format.

Barry

On Fri, Aug 11, 2017 at 5:35 PM, Mary Haley <haley at ucar.edu> wrote:

> We could certainly do that, but the format string was set up to allow you
> to enter text in additional to format strings, for example:
>
>  i = ispan( 95,105, 1)
>  j = ispan(905,1005,10)
>
>  write_table("example4.txt","w",[/i,j/],"first_%05i second_%05i")
>
> which gives you:
>
> first_00095 second_00905
> first_00096 second_00915
> . . .
>
> Like you said, we would have to choose which special character could be
> used.  I suppose in the case of write_table, you could use setfileoption
> to set or change the special character.
>
> --Mary
>
>
>
>
> On Thu, Aug 10, 2017 at 2:31 PM, David Brown <dbrown at ucar.edu> wrote:
>
>> I am wondering if we could provide a special formatting character that
>> could be part of the format string, maybe at the beginning, and would
>> signal that no automatic separator character be used. Of course which
>> character to use might be an issue, but hopefully that could be
>> solved.
>>  -dave
>>
>> On Thu, Aug 10, 2017 at 2:12 PM, Dennis Shea <shea at ucar.edu> wrote:
>> > Fortran (some other languages too!) has the capability to provide user
>> > specified granularity in parsing strings of numbers and characters.
>> >
>> > fortran:   format(i2,5i5)
>> >               2999999999999999999999999999999
>> >
>> > The problem is someone must tell you the structure. You could read as
>> > follows:
>> >               format(i2,i2,i3,i5,i4,i1,.......)
>> >
>> > However, any 'automatic' software must have some separator between the
>> > numbers.
>> >
>> > --
>> > NCDC has text files the include letters, numbers, periods (76.5) all
>> > together.
>> >
>> > ====
>> > fortran:   format(i2,5(1x,i5))
>> >               2 99999 99999 99999 99999 99999 99999
>> >
>> > Just a comment
>> > D
>> >
>> > On Thu, Aug 10, 2017 at 12:02 PM, Rabah Hachelaf <hachelaf at sca.uqam.ca>
>> > wrote:
>> >>
>> >> Hi Mary and Karin,
>> >>
>> >> Adding white-spaces by default is a limitation if we need to write some
>> >> data using a FORTRAN format.
>> >> We could bypass this "issue" by removing one character starting from
>> the
>> >> 2nd variable but we would have liked to keep the same format between
>> FORTRAN
>> >> and NCL
>> >>
>> >> Regards,
>> >>
>> >> Rabah
>> >>
>> >> 2017-08-10 13:15 GMT-04:00 Mary Haley <haley at ucar.edu>:
>> >>>
>> >>> Hi Rabah,
>> >>>
>> >>> I see Karin already responded, and had the same response I was just
>> about
>> >>> to send!
>> >>>
>> >>> I'll go ahead and include my response here. I've updated the
>> >>> documentation to indicate this behavior, and also created a ticket
>> just in
>> >>> case.
>> >>>
>> >>> Unfortunately, I think this is a "feature" of write_table. Even if
>> >>> there's a case for declaring this a bug, we probably couldn't change
>> the
>> >>> behavior because we'd likely break a bunch of existing scripts that
>> depend
>> >>> on the space being there.
>> >>>
>> >>> I created a ticket on this (NCL-2646), in case it's an issue for other
>> >>> users.
>> >>>
>> >>> Meanwhile, as Karin pointed out, I think the only way around this is
>> to
>> >>> concatenate the strings yourself:
>> >>>
>> >>> int1 = 2
>> >>> int2 = "99999"
>> >>> int3 = "99999"
>> >>> int4 = "99999"
>> >>> int5 = "99999"
>> >>> int6 = "99999"
>> >>> int7 = "99999"
>> >>> int_cat = int2+int3+int4+int5+int6+int7
>> >>> sounding_check = [/int1,int_cat/]
>> >>> write_table(outfile,"w",sounding_check,"%2i%s")
>> >>>
>> >>> In general, I would caution against writing numbers to a file without
>> any
>> >>> spaces, because this makes it potentially very difficult for somebody
>> else
>> >>> looking at the file to know how to read it.  However, I do understand
>> that
>> >>> some of these files have historically been written this way for other
>> >>> purposes
>> >>>
>> >>> --Mary
>> >>>
>> >>>
>> >>>
>> >>> On Wed, Aug 9, 2017 at 3:13 PM, Rabah Hachelaf <hachelaf at sca.uqam.ca>
>> >>> wrote:
>> >>>>
>> >>>>
>> >>>> Hello,
>> >>>> I am wounding why there is a systematic white-spaces between values
>> >>>> although they are removed from the format specifier.
>> >>>> How can i remove white spaces from in this case.
>> >>>>
>> >>>> Thank you
>> >>>>
>> >>>>
>> >>>> begin
>> >>>> outfile = "test.txt"
>> >>>> sounding_check = [/2,"99999","99999","99999","9
>> 9999","99999","99999"/]
>> >>>> write_table(outfile,"a",sounding_check,"%2i%s%s%s%s%s%s")
>> >>>>
>> >>>> end
>> >>>>
>> >>>>
>> >>>> output :
>> >>>>  2 99999 99999 99999 99999 99999 99999
>> >>>> --
>> >>>> ------------------------------
>> >>>> Best regards,
>> >>>> Rabah Hachelaf
>> >>>>
>> >>>>
>> >>>>
>> >>>> _______________________________________________
>> >>>> ncl-talk mailing list
>> >>>> ncl-talk at ucar.edu
>> >>>> List instructions, subscriber options, unsubscribe:
>> >>>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>> >>>>
>> >>>
>> >>
>> >>
>> >>
>> >> --
>> >> ------------------------------
>> >> Cordialement,
>> >> Best regards,
>> >> Rabah Hachelaf
>> >>
>> >> _______________________________________________
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>> >>
>> >
>> >
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>
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-- 
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

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