cdflib.SetVarReservePercent - Specify reserve percentage for variable

Syntax

Description

cdflib.setVarReservePercent(cdfId,varNum,percent) specifies the compression reserve percentage for a variable in a Common Data Format (CDF) file.

Input Arguments

Definitions

reserve percentage

Specifies how much extra space to allocate for a compressed variable. This extra space allows the variable to expand when you write additional records to the variable. If you do not specify this room for growth, the library has to move the variable to the end of the file when the size expands and the space at the original location of the variable becomes wasted space.

Examples

Create a CDF, create a variable, set the compression of the variable, and then set the reserve percent for the variable. To run this example, you must be in a writable folder.

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

% Create a variable in the file.
varNum = cdflib.createVar(cdfid,'Time','cdf_int1',1,[],true,[]);
        
% Set the compression of the variable.
cdflib.setVarCompression(cdfid,varNum,'GZIP_COMPRESSION',8);
        
% Set the compression reserver percentage
cdflib.setVarReservePercent(cdfid,varNum, 80);
        
cdflib.close(cdfid);

References

This function corresponds to the CDF library C API routine CDFsetzVarReservePercent. 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.getVarCompression | cdflib.getVarReservePercent | cdflib.setVarCompression

Tutorials

• Importing Common Data File Format (CDF) Files
• Exporting to Common Data File Format (CDF) Files

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