MinimizerUtils Namespace Reference

Functions
std::string	toString (const std::vector< std::string > &v, const std::string &delim="")
std::map< int, std::string >	gslErrorDescriptionMap ()
std::string	gslErrorDescription (int errorCode)
bool	numbersDiffer (double a, double b, double tol)
std::string	sectionString (const std::string &sectionName="", size_t report_width=80)

Detailed Description

Utility functions for fit library.

Function Documentation

toString()

std::string MinimizerUtils::toString	(	const std::vector< std::string > &	v,
		const std::string &	delim = ""
	)

Definition at line 21 of file MinimizerUtils.cpp.

{
    std::stringstream s;
    std::for_each(v.begin(), v.end(),
                  [&s, &delim](const std::string& elem) { s << elem << delim; });
    return s.str();
}

Referenced by MinimizerCatalog::toString().

gslErrorDescriptionMap()

std::map< int, std::string > MinimizerUtils::gslErrorDescriptionMap

(

)

Returns translation of GSL error code to string.

Definition at line 31 of file MinimizerUtils.cpp.

{
    std::map<int, std::string> result;
 
    result[0] = "OK, valid minimum";
    result[-2] = "iteration has not converged";
    result[1] = "input domain error, e.g sqrt(-1)";
    result[2] = "output range error, e.g. exp(1e100)";
    result[3] = "invalid pointer";
    result[4] = "invalid argument supplied by user";
    result[5] = "generic failure";
    result[6] = "factorization failed";
    result[7] = "sanity check failed - shouldn't happen";
    result[8] = "malloc failed";
    result[9] = "problem with user-supplied function";
    result[10] = "iterative process is out of control";
    result[11] = "exceeded max number of iterations";
    result[12] = "tried to divide by zero";
    result[13] = "user specified an invalid tolerance";
    result[14] = "failed to reach the specified tolerance";
    result[15] = "underflow";
    result[16] = "overflow ";
    result[17] = "loss of accuracy";
    result[18] = "failed because of roundoff error";
    result[19] = "matrix, vector lengths are not conformant";
    result[20] = "matrix not square";
    result[21] = "apparent singularity detected";
    result[22] = "integral or series is divergent";
    result[23] = "requested feature is not supported by the hardware";
    result[24] = "requested feature not (yet) implemented";
    result[25] = "cache limit exceeded";
    result[26] = "table limit exceeded";
    result[27] = "iteration is not making progress towards solution";
    result[28] = "jacobian evaluations are not improving the solution";
    result[29] = "cannot reach the specified tolerance in F";
    result[30] = "cannot reach the specified tolerance in X";
    result[31] = "cannot reach the specified tolerance in gradient";
 
    return result;
}

Referenced by gslErrorDescription().

gslErrorDescription()

std::string MinimizerUtils::gslErrorDescription

(

int

errorCode

)

Definition at line 72 of file MinimizerUtils.cpp.

{
    static std::map<int, std::string> errorDescription = gslErrorDescriptionMap();
 
    auto it = errorDescription.find(errorCode);
    if (it != errorDescription.end())
        return it->second;
 
    return "Unknown error";
}

References gslErrorDescriptionMap().

Referenced by GSLLevenbergMarquardtMinimizer::statusToString(), and GSLMultiMinimizer::statusToString().

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numbersDiffer()

bool MinimizerUtils::numbersDiffer	(	double	a,
		double	b,
		double	tol
	)

Definition at line 83 of file MinimizerUtils.cpp.

{
    constexpr double eps = std::numeric_limits<double>::epsilon();
    if (tol < 1)
        throw std::runtime_error("MinimizerUtils::numbersDiffer() -> Error.Not intended for tol<1");
    return std::abs(a - b) > eps * std::max(tol * eps, std::abs(b));
}

References anonymous_namespace{PolyhedralComponents.cpp}::eps.

sectionString()

std::string MinimizerUtils::sectionString	(	const std::string &	sectionName = "",
		size_t	report_width = 80
	)

Returns horizontal line of 80 characters length with section name in it.

Definition at line 93 of file MinimizerUtils.cpp.

{
    if (sectionName.empty())
        return std::string(report_width, '-') + "\n";
    // to make "--- SectionName ------------------------------"
    std::string prefix(3, '-');
    std::string body = std::string(" ") + sectionName + " ";
    std::string postfix(report_width - body.size() - prefix.size(), '-');
    std::ostringstream result;
    result << prefix << body << postfix << std::endl;
    return result.str();
}

Referenced by anonymous_namespace{MinimizerResultUtils.cpp}::reportOption(), MinimizerResultUtils::reportParameters(), anonymous_namespace{MinimizerResultUtils.cpp}::reportStatus(), MinimizerResultUtils::reportToString(), and Fit::MinimizerResult::toString().