Re: [netcdfgroup] Multiple-line attributes

The \n is the method for embedding a new line in 'C'.
To do it in FORTRAN, you will need to do something like:

status = nf_put_att_text(ncid,nf_global,'experimental3',16,"LineOne" // char(10) // 
"LineTwo.")

Ian Harris wrote:
Hi,

Firstly, apologies if this list isn't the closest match to my problem - I can't 
see one closer!

I'm writing NetCDF files from F77, all working nicely.. until I try to write 
text attributes with multiple lines.

As far as I can discover, I'm supposed to embed '\n' terminators in the 
strings, which makes sense to me. UCAR's NetCDF information includes:

<QUOTE>
The usual escape conventions for C strings are honored. For example:

     "a"            // ASCII 'a'
     "Two\nlines\n" // a 10-character string with two embedded newlines
     "a bell:\007"  // a string containing an ASCII bell
     "ab","cde"     // the same as "abcde"
</QUOTE>

(From http://www.unidata.ucar.edu/software/netcdf/docs/netcdf.html - I'm 
currently running NetCDF 3.6.3 according to ncdump)

However, when I try this, it doesn't seem to work. The library seems to add a 
second backslash. For example:

I run:

status = nf_put_att_text(ncid,nf_global,'experimental3',16,"LineOne\nLineTwo.")

ncdump -h on the result:

                :experimental3 = "LineOne\\nLineTwo" ;

I note that the full stop is missing from the end, implying to me that the '\n' 
has been counted as a single character, but the extra '\' has exhausted the 
character count (16) before the end.

Is this expected behaviour? If so, is there any way for me to produce 
multi-line attribute values?

Cheers

Harry
Ian "Harry" Harris
Climatic Research Unit
School of Environmental Sciences
University of East Anglia
Norwich NR4 7TJ
United Kingdom

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Department of Atmospheric Science
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