Comments (4)
Agreed it should be a separate function. The input could be a single flat
vector with NaN entries for unspecified values. This is the format we use
in MathProgBase.
On Jun 14, 2016 03:12, "Robert Schwarz" [email protected] wrote:
To give an initial solution, the user might want to give values for (a
subset of) the variables.
These should be checked at the beginning of the solve.I prefer to not change the signature of CSIPaddVar and instead provide a
new function CSIPsetInitialValues, analogous to the bounds.Also, I'm not sure whether SCIP already supports "partial" solutions, but
I believe it's still WIP. In that case, I don't want to implement anything
on the CSIP side now, but just try to pass the (0-filled?) values as a full
solution candidate.See also the discussion about heuristic callbacks in #3
#3.—
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So there will be a heuristic plugin in the next SCIP release (or now, on the master branch) that supports "partial solutions". We would then be able to call SCIPcreatePartialSol
and the subtree below the fixations will be searched with some limits.
In the current release, only full solutions are supported.
from csip.
Can you call SCIPcreatePartialSol
during the solve also?
from csip.
No, according to the docs, it's only possible in the PROBLEM
stage.
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Related Issues (20)
- create conda recipe HOT 1
- add general nonlinear constraints (expression graph based) HOT 5
- add function to change variable type HOT 3
- simplify makefile with environment variable for scipoptsuite
- Compiling on Mac OS X
- Segmentation fault on Mac HOT 2
- Add all methods needed for SCIP.jl HOT 4
- Support partial solutions with CSIPsetInitialSolution
- Implicitely call `freeTransform` in all functions that modify the problem.
- Warn about invalidated information after freeTransform
- Lazy constraint callbacks vs `CONSCHECK`: Don't ask twice about the same solution.
- memory leak in createExprtree HOT 8
- upgrade to scip 4.0 HOT 12
- CSIP fails to compile HOT 5
- nonlinear objective functions break initial solution candidates HOT 4
- Build scipoptlib failed HOT 4
- Install instruccions not working HOT 1
- Supporting trig expressions (SCIP_EXPR_{SIN|COS|TAN}) HOT 4
- decide on the data structure to store vars and cons HOT 2
- Support for adding nonlinear constraints from lazy callbacks HOT 4
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