cdflib.inquireAttrEntry

Information about entry in attribute with variable scope

Syntax

[datatype,numElements] = cdflib.inquireAttrEntry(cdfId,attrNum,entryNum)


Description

[datatype,numElements] = cdflib.inquireAttrEntry(cdfId,attrNum,entryNum) returns the data type and the number of elements for an attribute entry in a Common Data Format (CDF) file.

Input Arguments

cdfId	Identifier of a CDF file, returned by a call to cdflib.create or cdflib.open.
attrNum	Numeric value identifying an attribute in the file. Attribute numbers are zero-based. The attribute must have variable scope.
entryNum	Numeric value identifying the entry in the attribute. Entry number are zero-based.

Output Arguments

datatype	Character vector identifying a CDF data type. For a list of CDF data types, see cdflib.putAttrEntry
numElements	Numeric value indicating the number of elements in the entry.

Examples

Open example CDF, and then get information about entries associated with an attribute in the file:

cdfId = cdflib.open("example.cdf");

% The fourth attribute is of variable scope
attrscope = cdflib.getAttrScope(cdfId,3)

attrscope =

    'VARIABLE_SCOPE'

% Get information about the first entry for this attribute
[dtype,numel] = cdflib.inquireAttrEntry(cdfId,3,0)

dtype =

    'cdf_char'


numel =

    10

% Clean up
cdflib.close(cdfId)
clear cdfId

Tips

• This function corresponds to the CDF library C API routine CDFinquireAttrzEntry.

• To use this function, you must be familiar with the CDF C interface. You can access the CDF documentation at the CDF website.

Version History

R2022b: Read CDF_INT8 and CDF_TIME_TT2000 attributes

You can read information about CDF_INT8 and CDF_TIME_TT2000 attributes.