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Close specified variable from multifile format Common Data Format (CDF) file




cdflib.closeVar(cdfId,varNum) closes a variable in a multifile format CDF.

cdfId identifies the CDF file and varNum is a numeric value that specifies the variable. Variable identifiers (variable numbers) are zero-based.

For multifile CDFs, you must close all open variable files to guarantee that all modifications you have made are actually written to the CDF file(s). You do not need to call this function for variables in a single-file format CDF.


Create a multifile CDF, create a variable, and then close the variable. To run this example, you must be in a writable folder.

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

% Make it a multifile format CDF

% Create a variable in the CDF.
varNum = cdflib.createVar(cdfid,'Time','cdf_int1',1,[],true,[]);

%  Close the variable.
cdflib.closeVar(cdfid, varnum)

% Clean up
clear cdfid


This function corresponds to the CDF library C API routine CDFclosezVar.

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