Delete entry in global attribute
cdflib.deleteAttrgEntry(cdfId,attrNum,entryNum)
cdflib.deleteAttrgEntry(cdfId,attrNum,entryNum)
deletes an entry from a global attribute in a Common Data Format (CDF)
file.
|
Identifier of a CDF file, returned by a call to |
|
Numeric value that identifies the attribute. Attribute numbers are zero-based. The attribute must have global scope. |
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Numeric value that specifies the entry in the attribute. Entry numbers are zero-based. |
Create a CDF and create a global attribute in the file. Write a value to an entry for the attribute and then delete the entry. To run this example, you must be in a writable folder.
cdfid = cdflib.create('your_file.cdf');
% Initially the file contains no attributes, global or variable.
info = cdflib.inquire(cdfid)
info =
encoding: 'IBMPC_ENCODING'
majority: 'ROW_MAJOR'
maxRec: -1
numVars: 0
numvAttrs: 0
numgAttrs: 0
% Create an attribute with global scope in the file.
attrNum = cdflib.createAttr(cdfid,'my_global_attr','global_scope');
% Write a value to an entry for the attribute
cdflib.putAttrgEntry(cdfid,attrNum,0,'CDF_CHAR','My global attr');
% Get the value of the global attribute entry
value = cdflib.getAttrgEntry(cdfid,attrNum,0)
value =
My global attr
% Delete the entry
cdflib.deleteAttrgEntry(cdfid,attrNum,0);
% Now try to view the value of the entry
% Should return NO_SUCH_ENTRY failure.
value = cdflib.getAttrgEntry(cdfid,attrNum,0) % Should fail
% Clean up
cdflib.delete(cdfid);
clear cdfidThis function corresponds to the CDF library C API routine CDFdeleteAttrgEntry.
To use this function, you must be familiar with the CDF C
interface. Read the CDF documentation at the CDF website.
For copyright information, see the cdfcopyright.txt file.