GDX file read/write

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The dollar commands in this group allow one to pass data to and from GDX files as discussed in the GDX chapter.  The dollar commands in this group are:

 

$GdxinDollar command that opens/closes a GDX file for input.
$GdxoutDollar command that opens/closes a GDX file for output.
$LoadDollar command that loads data from a GDX file.
$LoaddcDollar command that loads data from a GDX file with domain checking.
$LoaddcmDollar command that loads data from a GDX file (mixture of $Loaddc and $Loadm).
$LoaddcrDollar command that loads data from a GDX file (mixture of $Loaddc and $Loadr)
$LoadmDollar command that loads data from a GDX file and merges it.
$LoadrDollar command that loads data from a GDX file and replaces sets or parameters with the data from that file
$UnloadDollar command that unloads data to a GDX file.