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cdflib.createAttr - Create attribute

Syntax

attrnum = cdflib.createAttr(cdfId,attrName,scope)

Description

attrnum = cdflib.createAttr(cdfId,attrName,scope) creates an attribute in a CDF file with the specified scope.

Input Arguments

cdfId

Identifier of a CDF file, returned by a call to cdflib.create or cdflib.open.

attrName

Text string that specifies the name you want to assign to the attribute.

scope

One of the following text strings, or its numeric equivalent, that specifies the scope of the attribute.

Text StringDescription
'global_scope'Attribute applies to the CDF as a whole.
'variable_scope'Attribute applies only to the variable

To get the numeric equivalent of these text string constants, use the cdflib.getConstantValue function.

Output Arguments

attrNum

Numeric value identifying the attribute. Attribute numbers are zero-based.

Examples

Create a CDF, and then create an attribute in the CDF. To run this example, you must be in a writable folder.

cdfid = cdflib.create('your_file.cdf');

% Create attribute
attrNum = cdflib.createAttr(cdfId,'Purpose','global_scope');

% Clean up
cdflib.delete(cdfid);

clear cdfid

References

This function corresponds to the CDF library C API routine CDFcreateAttr. To use these functions, you must be familiar with the CDF C interface. Read the CDF documentation at the CDF Web site. For copyright information, see the cdfcopyright.txt file.

See Also

cdflib.deleteAttr | cdflib.getAttrNum | cdflib.getConstantNames | cdflib.getConstantValue

Tutorials

  

 

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