Example: Function call: variance(matrix_50).

 

matrix_50:

 

 

at point_1:

 

 

MATLAB code (.\Aorda\PSG\MATLAB\Examples\Functions\Func_value_variance.m) for function calculation:

 

addpath('..')

%Define data:

H1 = [1 4 8 3;7 5 4 6;2 8 1 0;0 3 4 9];

c1 = [2;11;6;10];

p1 = [0.2;0.2;0.3;0.3];

a = [1;1;1;1];

 

%=======================================================================

%Calculation of function with PSG Subroutine 'functionvalue'

%Calculate variance function at point 'a':

val1 = functionvalue('variance', [], H1, c1, p1, a);

%Display function value:

disp(sprintf('functionvalue = %g', val1));

%=======================================================================

%Calculation of function with PSG Subroutine 'tbpsg_function_value'

%Create the PSG matrix 'matrix_1'(structure containing header and matrix body) and pack it to structure 'toolboxstruc_arr':

toolboxstruc_arr(1) = tbpsg_matrix_pack('matrix_1', H1, [],  c1, p1);

%Create the PSG point 'point_1'(structure containing header and matrix body) and pack it to structure 'toolboxstruc_arr':

toolboxstruc_arr(2) = tbpsg_point_pack('point_1', a, []);

%Calculate variance function at point 'point_1':

val2 = tbpsg_function_value('variance(matrix_1)','point_1',toolboxstruc_arr);

%Display function value:

disp(sprintf('tbpsg_function_value = %g', val2));

%=======================================================================

%Creation of User Subroutine for calculating function value

%User subroutine is similar to the 'functionvalue'

%Create problem statement:

problem_statement = sprintf('%s\n',...

'calculate',...

'Point: point_1',...

'  variance(matrix_1)',...

' ');

%Create Subroutine:

tbpsg_create_user_subroutine(problem_statement,toolboxstruc_arr,'.\','calculate_variance');

%Uncomment section to call the user subroutine 'calculate_variance':

%{

%Calculation of function with User Subroutine 'calculate_variance':

[solution_str,outargstruc_arr] = calculate_variance(H1,matrix_1_vars,c1,p1,a,point_1_vars);

%Extract function value from the solution report:

val = tbpsg_function_data(solution_str, outargstruc_arr);

%}

 

 

Program output:

 

functionvalue = 12.81

tbpsg_function_value = 12.81