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CDF_OPEN

CDF_OPEN

The CDF_OPEN function opens an existing Common Data Format file.

Examples


id = CDF_OPEN('open_close.cdf')   ; Open a file.
; ... other CDF_ commands ...
CDF_CLOSE, id ; Close the cdf file.

Syntax


Result = CDF_OPEN(Filename [, /READONLY] )

Return Value


If successful, the CDF ID for the file is returned.

Arguments


Filename

A scalar string containing the name of the file to be created. Note that if the desired filename has a .cdf ending, you can omit the extension and specify just the first part of the filename. For example, specifying “mydata” would open the file mydata.cdf.

Keywords


READONLY

Set this keyword to open the specified CDF file in readonly mode. Opening a file in readonly mode will result in significant performance improvement if there is a large amount of metadata and a large portion of the metadata is read.

Version History


Pre 4.0

Introduced

7.0.3

READONLY keyword added



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