| undefining structures ? [message #1596] |
Mon, 06 December 1993 10:13  |
lucio
Messages: 5
Registered: December 1993
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Junior Member |
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I am trying to read in files of a priori undefined organization within IDL.
The files are "tabular" binary files (an a priori unknown number of columns
of an a priori unknown type with an a priori unknown number of rows).
"a priori unknown" means documented in a file header.
What I wish to have is a procedure myread,'myfile.name',s
which returns a structure s
This structure will have a number of members s.keyname corresponding to
keywords, and a member s.data.
The member s.data is created as: data:replicate(template,nrows)
where template is constructed building up a string containing a statement
like the following and doing an "test=execute(statement)"
template= {record,TIME:0L, THETA:0L, PHI:0L, ENERGY:0 , undef:0B}
^^^^^^
where the names and types of the tags are constructed by my procedure
according to information in the file itself. So later I can access the
individual columns as s.data.time, etc.
I MUST use a named structure, otherwise I'm getting an error "cannot have
an anonymous structure as a member of another structure").
This is fine the first time, or if I read more files with the same "record
structure", but if I try to read a file with a different structure, I get
an error % Wrong number of tags defined for structure: RECORD.
Is there any way I can REMOVE this structure from being defined (note that
it does not correspond to any true variable in use), and re-use it again ?
PS
I'm using IDL 2.2.1 (and I'm not likely to update it for the time being)
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A member of G.ASS : Group for Astronomical Software Support
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Lucio Chiappetti - IFCTR/CNR Milano | U N I C U I Q U E
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