problem.write
problem.write |
Purpose
Writes the current problem to an MPS or LP file.
Synopsis
problem.write(filename, flags)
Arguments
|
filename
|
A string of up to 200 characters to contain the file name to which the problem is to be written. If omitted, the default
problem_name is used with a
.mps extension, unless the
l flag is used in which case the extension is
.lp.
|
||||||||||||||
|
flags
|
(optional) Flags, which can be one or more of the following:
|
Example
The following example outputs the current problem in full precision, LP format with scrambled vector names to the file
problem_name
.lp.
p.write("", "lps")
Further information
1. If
problem.loadproblem is used to obtain a problem then there is no association between the objective function and the
N rows in the problem and so a separate
N row (called
__OBJ___) is created upon a
write. Also, if after a call to
read either the objective row or the
N row in the problem corresponding to the objective row are changed, the association between the two is lost and the
__OBJ___ row is created with an
write. To remove the objective row from the problem when doing a
read, set
keepnrows to
-1 before
read.
2. The hexadecimal format is useful for saving the exact internal precision of the problem.
3.
Warning: If
problem.read is used to input a problem, then the input file will be overwritten by
write if a new filename is not specified.
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