h02cd:: Operations Research (NAG Toolbox)

nag_mip_iqp_dense_optstr (h02cd) may be used to supply values for optional parameters to nag_mip_iqp_dense (h02cb). It is only necessary to call nag_mip_iqp_dense_optstr (h02cd) for those arguments whose values are to be different from their default values. One call to nag_mip_iqp_dense_optstr (h02cd) sets one argument value.

Each optional parameter is defined by a single character string of up to

72

characters, consisting of one or more items. The items associated with a given option must be separated by spaces, or equal signs

[=]

. Alphabetic characters may be upper or lower case. The string

 Print level = 1

is an example of a string used to set an optional parameter. For each option the string contains one or more of the following items:

–	a mandatory keyword;
–	a phrase that qualifies the keyword;
–	a number that specifies an integer or double value. Such numbers may be up to $16$ contiguous characters in Fortran 77's I, F, E or D formats, terminated by a space if this is not the last item on the line.

Normally, each user-specified option is printed as it is defined, on the current advisory message unit (see nag_file_set_unit_advisory (x04ab)), but this printing may be suppressed using the keyword Nolist. Thus the statement

h02cd('Nolist')

suppresses printing of this and subsequent options. Printing will automatically be turned on again after a call to nag_mip_iqp_dense (h02cb), and may be turned on again at any time by you, by using the keyword List.

Optional parameter settings are preserved following a call to nag_mip_iqp_dense (h02cb), and so the keyword Defaults is provided to allow you to reset all the optional parameters to their default values by the statement,

h02cd('Defaults')

prior to a subsequent call to nag_mip_iqp_dense (h02cb).

References

Parameters

Compulsory Input Parameters

Optional Input Parameters

Output Parameters

Error Indicators and Warnings

Accuracy

Further Comments

Example

function h02cd_example


fprintf('h02cd example results\n\n');

big = 1e25;
a    = [ 1,     1,      1,      1,      1,      1,       1;
         0.15,  0.04,   0.02,   0.04,   0.02,   0.01,    0.03;
         0.03,  0.05,   0.08,   0.02,   0.06,   0.01,    0.00;
         0.02,  0.04,   0.01,   0.02,   0.02,   0.00,    0.00;
         0.02,  0.03,   0.00,   0.00,   0.01,   0.00,    0.00;
         0.70,  0.75,   0.80,   0.75,   0.80,   0.97,    0.00;
         0.02,  0.06,   0.08,   0.12,   0.02,   0.01,    0.97];
cvec = [-0.02, -0.20,  -0.20,  -0.20,  -0.20,   0.04,    0.04];
bl   = [-0.01, -0.10,  -0.01,  -0.04,  -0.10,  -0.01,   -0.01, ...
        -0.13, -big,   -big,   -big,   -big,   -0.0992, -0.003];
bu   = [ 0.01,  0.15,   0.03,   0.02,   0.05,   big,     big,  ...
        -0.13, -0.0049,-0.0064,-0.0037,-0.0012, big,     0.002];
h    = [ 2,     0,      0,      0,      0,      0,       0;
         0,     2,      0,      0,      0,      0,       0;
         0,     0,      2,      2,      0,      0,       0;
         0,     0,      2,      2,      0,      0,       0;
         0,     0,      0,      0,      2,      0,       0;
         0,     0,      0,      0,      0,     -2,      -2;
         0,     0,      0,      0,      0,     -2,      -2];
xs   = [-0.01,  0.03,   0,     -0.01,  -0.1,    0.02,    0.01];
intvar = [int64(4)];
istate = zeros(14, 1, 'int64');
strtgy = int64(2);

h02cd('Nolist');
h02cd('Print Level = 0');

[istate, xs, obj, ax, clamda, ifail] = ...
h02cb( ...
       a, bl, bu, cvec, h, @qphess, intvar, istate, xs, strtgy, @monit);

fprintf('Optimal Integer Value is = %20.8e\n',obj);
disp('Components are:');
for j=1:7
  fprintf('x(%2d) = %12.8f\n',j,xs(j));
end



function [hx] = qphess(n, jthcol, h, ldh, x)
  hx = h*x;

function [bstval, halt, count] = monit(intfnd, nodes, depth, obj, x, ...
                                       bstval, bstsol, bl, bu, n, halt, count)

h02cd example results

Optimal Integer Value is =       3.74696620e-02
Components are:
x( 1) =  -0.01000000
x( 2) =  -0.07332830
x( 3) =  -0.00025809
x( 4) =   0.00000000
x( 5) =  -0.06335433
x( 6) =   0.01410944
x( 7) =   0.00283128

NAG Toolbox: nag_mip_iqp_dense_optstr (h02cd)

▸▿ Contents

Purpose

Syntax

Description