Difference between revisions of "LpRead"
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In most cases, your file will have been written by a previous call to [[LpWrite]] or [[LpWriteIIS]]. | In most cases, your file will have been written by a previous call to [[LpWrite]] or [[LpWriteIIS]]. | ||
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| + | If only a file name without a directory path, or a relative file path is provided for «filename», it is interpreted relative to the [[CurrentDataDirectory]]. | ||
You may optionally pass in indexes for «vars» and «constraints». If you don't pass these in, the function will automatically create local indexes of the appropriate size to index the decision variables and constraints in the problem. If you do pass these, they will be used as the index for the decision variables and for the constraints, but must be of the correct length or an error results. | You may optionally pass in indexes for «vars» and «constraints». If you don't pass these in, the function will automatically create local indexes of the appropriate size to index the decision variables and constraints in the problem. If you do pass these, they will be used as the index for the decision variables and for the constraints, but must be of the correct length or an error results. | ||
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* [[LpWrite]] | * [[LpWrite]] | ||
* [[LpWriteIIS]] | * [[LpWriteIIS]] | ||
| + | * [[CurrentDataDirectory]] | ||
Revision as of 18:57, 28 January 2010
LpRead(filename, vars, constraints, format)
Reads a Linear Program specification from a file. The file must be in one of the standard recognized formats, specified in the optional «format» parameter:
- "LP" (default)
- "MPS"
- "LPFML"
In most cases, your file will have been written by a previous call to LpWrite or LpWriteIIS.
If only a file name without a directory path, or a relative file path is provided for «filename», it is interpreted relative to the CurrentDataDirectory.
You may optionally pass in indexes for «vars» and «constraints». If you don't pass these in, the function will automatically create local indexes of the appropriate size to index the decision variables and constraints in the problem. If you do pass these, they will be used as the index for the decision variables and for the constraints, but must be of the correct length or an error results.
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