helpers.h File Reference

file containing some basic helper functions More...

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Namespaces
namespace	jive_helpers
	namespace for all helper functions

Macros
#define	WARN(key)   jem::System::warn() << key << "\n";
#define	ERR(key)   jem::System::err() << key << "\n";

Typedefs
typedef Array< double, 4 >	jive_helpers::Quadix
typedef Array< IdxVector, 2 >	jive_helpers::IdxVectorMatrix

Functions
Vector	jive_helpers::funcGrad (const Ref< Function > func, const Vector &args)
	gets the gradient of a multivariate function.
Vector	jive_helpers::evalFuncs (const FuncUtils::FuncArray funcs, const Vector &args)
	evaluates an array of multivariate functions.
Matrix	jive_helpers::funcHessian (const Ref< Function > func, const Vector &args)
	gets the Hessian of a multivariate function.
Matrix	jive_helpers::gradFuncs (const FuncUtils::FuncArray funcs, const Vector &args)
	gets the gradients of an array of multivariate functions.
Matrix	jive_helpers::eye (const idx_t dim=3)
	generates an identity matrix of the given dimension.
void	jive_helpers::logMat (const Vector &rv, const Matrix &R)
	compute rotational vector from rotation matrix.
void	jive_helpers::vec2mat (const Matrix &mat, const Vector &vec)
	rearrange a vector into a matrix.
void	jive_helpers::mat2vec (const Vector &vec, const Matrix &mat)
	rearrange a matrix into a vector.
void	jive_helpers::expVec (const Matrix &Exp, const Vector &v)
	compute the exponential of a axial vector.
void	jive_helpers::expVecP (const Matrix &ExpP, const Vector &v, const Vector &vP)
	derivative of jive_helpers::expVec.
double	jive_helpers::trace (const Matrix &mat)
	calculate the trace of a matrix.
idx_t	jive_helpers::factorial (const idx_t n)
	calculates the factorial of an integer.
idx_t	jive_helpers::binom (const idx_t n, const idx_t k)
	calculate the binomial coefficient.
double	jive_helpers::matrixNorm2 (const Matrix &mat)
	calculates the 2-norm of a matrix.
Matrix	jive_helpers::skew (const Vector &vec)
	construct a skew symetric matrix from a given vector.
Vector	jive_helpers::unskew (const Matrix &mat)
	construct a axial vector from a given skew-symmetric matrix

Variables
const Vector	jive_helpers::e1 = {1., 0., 0.}
const Vector	jive_helpers::e2 = {0., 1., 0.}
const Vector	jive_helpers::e3 = {0., 0., 1.}
const Vector	jive_helpers::vec0 = {0., 0., 0.}
const double	jive_helpers::TINY = __DBL_EPSILON__ * 1e6

Detailed Description

Author

Til Gärtner

Macro Definition Documentation

ERR

#define ERR

(

key

)

jem::System::err() << key << "\n";

WARN

#define WARN

(

key

)

jem::System::warn() << key << "\n";