- Scilabヘルプ
- Optimization and Simulation
- Optimization base
- optimbase_cget
- optimbase_checkbounds
- optimbase_checkcostfun
- optimbase_checkx0
- optimbase_configure
- optimbase_destroy
- optimbase_function
- optimbase_get
- optimbase_hasbounds
- optimbase_hasconstraints
- optimbase_hasnlcons
- optimbase_histget
- optimbase_histset
- optimbase_incriter
- optimbase_isfeasible
- optimbase_isinbounds
- optimbase_isinnonlincons
- optimbase_log
- optimbase_new
- optimbase_outputcmd
- optimbase_outstruct
- overview
- optimbase_proj2bnds
- optimbase_set
- optimbase_stoplog
- optimbase_terminate
Please note that the recommended version of Scilab is 2024.1.0. This page might be outdated.
See the recommended documentation of this function
optimbase_outstruct
Returns a data structure with type T_OPTDATA.
Syntax
data = optimbase_outstruct(opt)
Argument
- opt
The object of TOPTIM type (tlist).
- data
A data structure with type T_OPTDATA containing at least the following fields.
- x
The current optimum.
- fval
The current function value.
- iteration
The current iteration index.
- funccount
The number of function evaluations.
Description
The optimbase_outstruct
function returns a data structure with
T_OPTDATA type. This data structure contains basic optimization fields.
The output argument data
is designed to be the input of the
optimbase_outputcmd
function which, in turn, calls back the output
function. This data structure may be enriched by children (specialized) optimization
methods.
Example
function [f, index]=fun(x, index) f = 2*x - 4; endfunction function stop=myoutputcmd(state, data) iter = data.iteration if ( state == "init" ) then mprintf ( "=================================\n"); mprintf ( "Initialization\n"); elseif ( state == "done" ) then mprintf ( "=================================\n"); mprintf ( "End of Optimization\n"); end fc = data.funccount fval = data.fval x = data.x mprintf ( "Iter. #%3d, Feval #%3d, Fval = %.1e, x = %s \n" , .. iter, fc, fval, strcat(string(x)," ")); stop = %f endfunction a = -5; b = 5; x0 = (a+b)/2;; // Creates the object opt = optimbase_new(); // Configures the object opt = optimbase_configure(opt,"-numberofvariables",2); opt = optimbase_configure(opt, "-x0", x0); opt = optimbase_configure(opt, "-tolxrelative", 10*%eps); opt = optimbase_configure(opt, "-maxiter", 100); opt = optimbase_configure(opt, "-function", fun); opt = optimbase_configure(opt,"-outputcommand", myoutputcmd); function x=Dicho(opt, a, b) xk = optimbase_cget(opt, "-x0"); [opt, fx0,index] = optimbase_function (opt , xk , 4); opt = optimbase_set ( opt , "-fx0" , fx0 ); opt = optimbase_set ( opt , "-xopt" , x0 ); opt = optimbase_set ( opt , "-fopt" , fx0 ); // OutputCmd brutedata = optimbase_outstruct ( opt ); data = tlist(["T_OPTBDATA",... "x","fval","iteration","funccount"]); data.x = brutedata.x; data.fval = brutedata.fval; data.iteration = brutedata.iteration; data.funccount = brutedata.funccount; stop = optimbase_outputcmd (opt , "init" , data ); while optimbase_get(opt, "-iterations") <optimbase_cget(opt, "-maxiter") [opt, f,index] = optimbase_function(opt, xk, 4); [opt, g, index] = optimbase_function(opt, a, 4); if g*f <=0 then b = xk; else a = xk; end x = (a+b)/2; opt = optimbase_incriter(opt); opt = optimbase_set ( opt , "-xopt" , x ); opt = optimbase_set ( opt , "-fopt" , f ); temp = abs(x-xk); if temp < optimbase_cget(opt, "-tolxrelative") // OutputCmd brutedata = optimbase_outstruct ( opt ); data = tlist(["T_OPTBDATA",... "x","fval","iteration","funccount"]); data.x = brutedata.x; data.fval = brutedata.fval; data.iteration = brutedata.iteration; data.funccount = brutedata.funccount; stop = optimbase_outputcmd (opt , "done" , data ); break end xk = x; // OutputCmd brutedata = optimbase_outstruct ( opt ); data = tlist(["T_OPTBDATA",... "x","fval","iteration","funccount"]); data.x = brutedata.x; data.fval = brutedata.fval; data.iteration = brutedata.iteration; data.funccount = brutedata.funccount; stop = optimbase_outputcmd (opt , "iter" , data ); end endfunction x = Dicho(opt,a,b)
See also
- optimbase_outputcmd — Calls back user's output command.
- optimbase_function — Calls cost function.
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