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

Name you want to assign to the attribute, specified as a character vector or string scalar.

scope

Scope of the attribute, specified as one of these character vectors or string scalars, or its numeric equivalent.

Value	Description
`'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 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

Tips

This function corresponds to the CDF library C API routine CDFcreateAttr.
To use this function, you must be familiar with the CDF C interface. You can access the CDF documentation at the CDF website.