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xprsoptimset

Purpose
Create or edit Xpress optimization options structures.
Synopsis
options = xprsoptimset('param1',value1,'param2',value2,...)
options = xprsoptimset
options = xprsoptimset(oldopts,'param1',value1,...)
options = xprsoptimset(oldopts,newopts)
Arguments
param* 
optimization control or attribute name
value* 
new value for the optimization option
oldopts 
optimization options structure to copy
newopts 
optimization options structure
Return value
A new optimization options structure.
Example
This statement creates an optimization options structure called options in which the FEASTOL parameter is set to 1e-8 and the MAXMIPSOL parameter is set to 10. 
options = xprsoptimset('FEASTOL',1e-8,'MAXMIPSOL',10)
This statement makes a copy of the options structure called options, changing the value of the PRESOLVE parameter and storing new values in optnew. 
optnew = xprsoptimset(options,'PRESOLVE',0);
This statement creates an Xpress optimization options structure with control values corresponding to the 'final' value of the MATLAB Toolbox option Display. 
options = xprsoptimset(optimset('Display', 'final'));
This statement returns an optimization options structure that contains all the parameter names and default values. Note that this should not be used as options for an actual solve since some defaults depend on the objective sense which would not have been set at this point. 
defaults = xprsoptimset
Further information
The function xprsoptimset creates an options structure that you can pass as an input argument to the Xpress optimization functions. You can use the options structure to change the default parameters for these functions.
options = xprsoptimset('param1',value1,'param2',value2,...)
 creates an optimization options structure called options, in which the specified parameters ( param*) have the specified values. The parameter names are case sensitive and must be valid Xpress control parameter names.
xprsoptimset
  with no input returns a complete list of parameters with their default values. Note that this should not be used as options for an actual solve since some defaults depend on the objective sense which would not have been set at this point.
options = xprsoptimset(oldopts,'param1',value1,...)
  creates a copy of oldopts, modifying or adding the specified parameters with the specified values.
options = xprsoptimset(oldopts,newopts)
  combines an existing options structure oldopts with a new options structure newopts. Any parameters in newopts with nonempty values overwrite the corresponding old parameters in oldopts
In the last two cases, oldopts can be a MATLAB Toolbox option structure, in which case the following parameters are converted to the corresponding Xpress controls (others are ignored):
Display → OUTPUTLOG, MIPLOG, LPLOG
MaxIter → LPITERLIMIT
TolRLPFun → OPTIMALITYTOL
MaxTime → MAXTIME
MaxNode → MAXNODE
NodeDisplayInterval → MIPLOG
NodeSearchStrategy → NODESELECTION
TolXInteger → MIPTOL
Only options that are set to a non-empty value are taken into consideration.
Related topics
xprsoptimget

Parent Topic Xpress MATLAB functions

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