lsst::afw::math::PolynomialFunction2< ReturnT > Class Template Reference

2-dimensional polynomial function with cross terms More...

#include <FunctionLibrary.h>

Inheritance diagram for lsst::afw::math::PolynomialFunction2< ReturnT >:

Public Member Functions
	PolynomialFunction2 (unsigned int order)
	Construct a polynomial function of specified order.
	PolynomialFunction2 (std::vector< double > params)
	Construct a polynomial function with specified parameters.
	PolynomialFunction2 (PolynomialFunction2 const &)=default
	PolynomialFunction2 (PolynomialFunction2 &&)=default
PolynomialFunction2 &	operator= (PolynomialFunction2 const &)=default
PolynomialFunction2 &	operator= (PolynomialFunction2 &&)=default
	~PolynomialFunction2 () noexcept override=default
std::shared_ptr< Function2< ReturnT > >	clone () const override
	Return a pointer to a deep copy of this function.
ReturnT	operator() (double x, double y) const noexcept(IS_NOTHROW_INIT< ReturnT >) override
std::vector< double >	getDFuncDParameters (double x, double y) const override
	Return the coefficients of the Function's parameters, evaluated at (x, y) I.e.
std::string	toString (std::string const &prefix) const override
	Return a string representation of the function.
bool	isPersistable () const noexcept override
	Return true if this particular object can be persisted using afw::table::io.
int	getOrder () const noexcept
	Get the polynomial order.
bool	isLinearCombination () const noexcept override
	Is the function a linear combination of its parameters?
unsigned int	getNParameters () const noexcept
	Return the number of function parameters.
virtual double	getParameter (unsigned int ind) const
	Get one function parameter without range checking.
std::vector< double > const &	getParameters () const noexcept
	Return all function parameters.
void	setParameter (unsigned int ind, double newValue)
	Set one function parameter without range checking.
void	setParameters (std::vector< double > const &params)
	Set all function parameters.
void	writeFits (std::string const &fileName, std::string const &mode="w") const
	Write the object to a regular FITS file.
void	writeFits (fits::MemFileManager &manager, std::string const &mode="w") const
	Write the object to a FITS image in memory.
void	writeFits (fits::Fits &fitsfile) const
	Write the object to an already-open FITS object.

Static Public Member Functions
static int	nParametersFromOrder (int order)
	Compute number of parameters from polynomial order.
static int	orderFromNParameters (int nParameters)
	Compute polynomial order from the number of parameters.
static std::shared_ptr< Function2< ReturnT > >	readFits (fits::Fits &fitsfile)
	Read an object from an already open FITS object.
static std::shared_ptr< Function2< ReturnT > >	readFits (std::string const &fileName, int hdu=fits::DEFAULT_HDU)
	Read an object from a regular FITS file.
static std::shared_ptr< Function2< ReturnT > >	readFits (fits::MemFileManager &manager, int hdu=fits::DEFAULT_HDU)
	Read an object from a FITS file in memory.
static std::shared_ptr< Function< ReturnT > >	readFits (fits::Fits &fitsfile)
	Read an object from an already open FITS object.
static std::shared_ptr< Function< ReturnT > >	readFits (std::string const &fileName, int hdu=fits::DEFAULT_HDU)
	Read an object from a regular FITS file.
static std::shared_ptr< Function< ReturnT > >	readFits (fits::MemFileManager &manager, int hdu=fits::DEFAULT_HDU)
	Read an object from a FITS file in memory.
static std::shared_ptr< Function2< ReturnT > >	dynamicCast (std::shared_ptr< Persistable > const &ptr)
	Dynamically cast a shared_ptr.
static std::shared_ptr< Function< ReturnT > >	dynamicCast (std::shared_ptr< Persistable > const &ptr)
	Dynamically cast a shared_ptr.

Protected Types
using	OutputArchiveHandle = io::OutputArchiveHandle

Protected Member Functions
std::string	getPersistenceName () const override
	Return the unique name used to persist this object and look up its factory.
void	write (afw::table::io::OutputArchiveHandle &handle) const override
	Write the object to one or more catalogs.
	PolynomialFunction2 ()
std::string	getPythonModule () const override
	Return the fully-qualified Python module that should be imported to guarantee that its factory is registered.

Protected Attributes
int	_order
	order of polynomial
std::vector< double >	_params
bool	_isCacheValid

Detailed Description

template<typename ReturnT>
class lsst::afw::math::PolynomialFunction2< ReturnT >

2-dimensional polynomial function with cross terms

f(x,y) = c0 (0th order)

• c1 x + c2 y (1st order)
• c3 x^2 + c4 x y + c5 y^2 (2nd order)
• c6 x^3 + c7 x^2 y + c8 x y^2 + c9 y^3 (3rd order)
• ...

Intermediate products for the most recent y are cached, so when computing for a set of x, y it is more efficient to change x before you change y.

Definition at line 447 of file FunctionLibrary.h.

Member Typedef Documentation

OutputArchiveHandle

using lsst::afw::table::io::Persistable::OutputArchiveHandle = io::OutputArchiveHandle

protectedinherited

Definition at line 108 of file Persistable.h.

Constructor & Destructor Documentation

PolynomialFunction2() [1/5]

template<typename ReturnT >

lsst::afw::math::PolynomialFunction2< ReturnT >::PolynomialFunction2 ( unsigned int order )

inlineexplicit

Construct a polynomial function of specified order.

The polynomial will have (order + 1) * (order + 2) / 2 coefficients

The parameters are initialized to zero.

Parameters

order

order of polynomial (0 for constant)

Definition at line 456 of file FunctionLibrary.h.

            : BasePolynomialFunction2<ReturnT>(order), _oldY(0), _xCoeffs(this->_order + 1) {}

PolynomialFunction2() [2/5]

template<typename ReturnT >

lsst::afw::math::PolynomialFunction2< ReturnT >::PolynomialFunction2 ( std::vector< double > params )

inlineexplicit

Construct a polynomial function with specified parameters.

The order of the polynomial is determined from the length of the params vector: order = (sqrt(1 + 8 * length) - 3) / 2 and if this is not an integer then the length is unsuitable

Exceptions

lsst::pex::exceptions::InvalidParameterError	if params length is unsuitable
lsst::pex::exceptions::Exception	if an internal sanity check fails

Parameters

params

polynomial coefficients (const, x, y, x^2, xy, y^2...); length must be one of 1, 3, 6, 10, 15...

Definition at line 469 of file FunctionLibrary.h.

            : BasePolynomialFunction2<ReturnT>(params), _oldY(0), _xCoeffs(this->_order + 1) {}

PolynomialFunction2() [3/5]

template<typename ReturnT >

lsst::afw::math::PolynomialFunction2< ReturnT >::PolynomialFunction2 ( PolynomialFunction2< ReturnT > const & )

default

PolynomialFunction2() [4/5]

template<typename ReturnT >

lsst::afw::math::PolynomialFunction2< ReturnT >::PolynomialFunction2 ( PolynomialFunction2< ReturnT > && )

default

~PolynomialFunction2()

template<typename ReturnT >

lsst::afw::math::PolynomialFunction2< ReturnT >::~PolynomialFunction2 ( )

overridedefaultnoexcept

PolynomialFunction2() [5/5]

template<typename ReturnT >

lsst::afw::math::PolynomialFunction2< ReturnT >::PolynomialFunction2 ( )

inlineexplicitprotected

Definition at line 560 of file FunctionLibrary.h.

: BasePolynomialFunction2<ReturnT>(), _oldY(0), _xCoeffs(0) {}

Member Function Documentation

clone()

template<typename ReturnT >

std::shared_ptr< Function2< ReturnT > > lsst::afw::math::PolynomialFunction2< ReturnT >::clone ( ) const

inlineoverridevirtual

Return a pointer to a deep copy of this function.

This function exists instead of a copy constructor so one can obtain a copy of an actual function instead of a useless copy of the base class.

Every non-virtual function must override this method.

Returns

a pointer to a deep copy of the function

Implements lsst::afw::math::Function2< ReturnT >.

Definition at line 480 of file FunctionLibrary.h.

                                                             {
        return std::shared_ptr<Function2<ReturnT>>(new PolynomialFunction2(this->_params));
    }

dynamicCast() [1/2]

template std::shared_ptr< meas::extensions::psfex::PsfexPsf > lsst::afw::table::io::PersistableFacade< Function2< ReturnT > >::dynamicCast ( std::shared_ptr< Persistable > const & ptr )

staticinherited

Dynamically cast a shared_ptr.

Dynamically cast a shared pointer and raise on failure.

You must provide an explicit template instantiation in the .cc file for each class that inherits from PersistableFacade. Designed to work around RTTI issues on macOS with hidden symbols;

Exceptions

lsst::pex::exceptions::LogicError

if the cast fails

param[in] ptr The pointer to be cast.

Returns

The cast pointer.

Exceptions

lsst::pex::exceptions::TypeError

If the dynamic cast fails.

Definition at line 218 of file Persistable.cc.

dynamicCast() [2/2]

template std::shared_ptr< meas::extensions::psfex::PsfexPsf > lsst::afw::table::io::PersistableFacade< Function< ReturnT > >::dynamicCast ( std::shared_ptr< Persistable > const & ptr )

staticinherited

Dynamically cast a shared_ptr.

Dynamically cast a shared pointer and raise on failure.

You must provide an explicit template instantiation in the .cc file for each class that inherits from PersistableFacade. Designed to work around RTTI issues on macOS with hidden symbols;

Exceptions

lsst::pex::exceptions::LogicError

if the cast fails

param[in] ptr The pointer to be cast.

Returns

The cast pointer.

Exceptions

lsst::pex::exceptions::TypeError

If the dynamic cast fails.

Definition at line 218 of file Persistable.cc.

getDFuncDParameters()

template<typename ReturnT >

std::vector< double > lsst::afw::math::PolynomialFunction2< ReturnT >::getDFuncDParameters ( double x, double y ) const

overridevirtual

Return the coefficients of the Function's parameters, evaluated at (x, y) I.e.

given c0, c1, c2, c3 ... return 1, x, y, x^2 ...

Reimplemented from lsst::afw::math::BasePolynomialFunction2< ReturnT >.

Definition at line 34 of file Function.cc.

                                                                                            {
    std::vector<double> coeffs(this->getNParameters());
 
    //
    // Go through params order by order, evaluating x^r y^s;  we do this by first evaluating
    // y^s for a complete order, then going through again multiplying by x^r
    //
    int i0 = 0;  // starting index for this order's coefficients
    for (int order = 0; order <= this->_order; ++order) {
        coeffs[i0] = 1;
        double zn = y;  // y^s
        for (int i = 1; i <= order; ++i) {
            coeffs[i0 + i] = zn;
            zn *= y;
        }
 
        zn = x;  // x^r
        for (int i = order - 1; i >= 0; --i) {
            coeffs[i0 + i] *= zn;
            zn *= x;
        }
 
        i0 += order + 1;
    }
 
    assert(i0 == static_cast<int>(coeffs.size()));
 
    return coeffs;
}

getNParameters()

template<typename ReturnT >

unsigned int lsst::afw::math::Function< ReturnT >::getNParameters ( ) const

inlinenoexceptinherited

Return the number of function parameters.

Returns

the number of function parameters

Definition at line 112 of file Function.h.

{ return _params.size(); }

getOrder()

template<typename ReturnT >

int lsst::afw::math::BasePolynomialFunction2< ReturnT >::getOrder ( ) const

inlinenoexceptinherited

Get the polynomial order.

Definition at line 360 of file Function.h.

{ return _order; }

getParameter()

template<typename ReturnT >

virtual double lsst::afw::math::Function< ReturnT >::getParameter ( unsigned int ind ) const

inlinevirtualinherited

Get one function parameter without range checking.

Returns

the specified function parameter

Parameters

ind	index of parameter

Definition at line 119 of file Function.h.

                  {
        return _params[ind];
    }

getParameters()

template<typename ReturnT >

std::vector< double > const & lsst::afw::math::Function< ReturnT >::getParameters ( ) const

inlinenoexceptinherited

Return all function parameters.

Returns

the function parameters as a vector

Definition at line 129 of file Function.h.

{ return _params; }

getPersistenceName()

template<typename ReturnT >

std::string lsst::afw::math::PolynomialFunction2< ReturnT >::getPersistenceName ( ) const

overrideprotectedvirtual

Return the unique name used to persist this object and look up its factory.

Must be less than ArchiveIndexSchema::MAX_NAME_LENGTH characters.

Reimplemented from lsst::afw::table::io::Persistable.

Definition at line 207 of file FunctionLibrary.cc.

                                                                 {
    return "PolynomialFunction2" + Suffix<ReturnT>::get();
}

getPythonModule()

template<typename ReturnT >

std::string lsst::afw::math::Function< ReturnT >::getPythonModule ( ) const

inlineoverrideprotectedvirtualinherited

Return the fully-qualified Python module that should be imported to guarantee that its factory is registered.

Must be less than ArchiveIndexSchema::MAX_MODULE_LENGTH characters.

Will be ignored if empty.

Reimplemented from lsst::afw::table::io::Persistable.

Definition at line 188 of file Function.h.

{ return "lsst.afw.math"; }

isLinearCombination()

template<typename ReturnT >

bool lsst::afw::math::BasePolynomialFunction2< ReturnT >::isLinearCombination ( ) const

inlineoverridevirtualnoexceptinherited

Is the function a linear combination of its parameters?

Returns

true if the function can be expressed as: sum over i of parameter_i * function_i(args)

Warning

: subclasses must override if true.

Reimplemented from lsst::afw::math::Function< ReturnT >.

Definition at line 362 of file Function.h.

{ return true; }

isPersistable()

template<typename ReturnT >

bool lsst::afw::math::PolynomialFunction2< ReturnT >::isPersistable ( ) const

inlineoverridevirtualnoexcept

Return true if this particular object can be persisted using afw::table::io.

Reimplemented from lsst::afw::table::io::Persistable.

Definition at line 547 of file FunctionLibrary.h.

{ return true; }

nParametersFromOrder()

template<typename ReturnT >

static int lsst::afw::math::BasePolynomialFunction2< ReturnT >::nParametersFromOrder ( int order )

inlinestaticinherited

Compute number of parameters from polynomial order.

Exceptions

lsst::pex::exceptions::InvalidParameterError

if order < 0

Definition at line 369 of file Function.h.

                                               {
        if (order < 0) {
            std::ostringstream os;
            os << "order=" << order << " invalid: must be >= 0";
            throw LSST_EXCEPT(lsst::pex::exceptions::InvalidParameterError, os.str());
        }
        return (order + 1) * (order + 2) / 2;
    }

operator()()

template<typename ReturnT >

ReturnT lsst::afw::math::PolynomialFunction2< ReturnT >::operator() ( double x, double y ) const

inlineoverridevirtualnoexcept

Implements lsst::afw::math::Function2< ReturnT >.

Definition at line 484 of file FunctionLibrary.h.

                                                                                             {
        /* Solve as follows:
        - f(x,y) = Cx0 + Cx1 x + Cx2 x^2 + Cx3 x^3 + ...
        where:
          Cx0 = P0 + P2 y + P5 y^2 + P9 y^3 + ...
          Cx1 = P1 + P4 y + P8 y2 + ...
          Cx2 = P3 + P7 y + ...
          Cx3 = P6 + ...
          ...
 
        Compute Cx0, Cx1...Cxn by solving 1-d polynomials in y in the usual way.
        These values are cached and only recomputed for new values of Y or if the parameters change.
 
        Then compute f(x,y) by solving the 1-d polynomial in x in the usual way.
        */
        const int maxXCoeffInd = this->_order;
 
        if ((y != _oldY) || !this->_isCacheValid) {
            // update _xCoeffs cache
            // note: paramInd is decremented in both of the following loops
            int paramInd = static_cast<int>(this->_params.size()) - 1;
 
            // initialize _xCoeffs to coeffs for pure y^n; e.g. for 3rd order:
            // _xCoeffs[0] = _params[9], _xCoeffs[1] = _params[8], ... _xCoeffs[3] = _params[6]
            for (int xCoeffInd = 0; xCoeffInd <= maxXCoeffInd; ++xCoeffInd, --paramInd) {
                _xCoeffs[xCoeffInd] = this->_params[paramInd];
            }
 
            // finish computing _xCoeffs
            for (int xCoeffInd = 0, endXCoeffInd = maxXCoeffInd; paramInd >= 0; --paramInd) {
                _xCoeffs[xCoeffInd] = (_xCoeffs[xCoeffInd] * y) + this->_params[paramInd];
                ++xCoeffInd;
                if (xCoeffInd >= endXCoeffInd) {
                    xCoeffInd = 0;
                    --endXCoeffInd;
                }
            }
 
            _oldY = y;
            this->_isCacheValid = true;
        }
 
        // use _xCoeffs to compute result
        double retVal = _xCoeffs[maxXCoeffInd];
        for (int xCoeffInd = maxXCoeffInd - 1; xCoeffInd >= 0; --xCoeffInd) {
            retVal = (retVal * x) + _xCoeffs[xCoeffInd];
        }
        return static_cast<ReturnT>(retVal);
    }

operator=() [1/2]

template<typename ReturnT >

PolynomialFunction2 & lsst::afw::math::PolynomialFunction2< ReturnT >::operator= ( PolynomialFunction2< ReturnT > && )

default

operator=() [2/2]

template<typename ReturnT >

PolynomialFunction2 & lsst::afw::math::PolynomialFunction2< ReturnT >::operator= ( PolynomialFunction2< ReturnT > const & )

default

orderFromNParameters()

template<typename ReturnT >

static int lsst::afw::math::BasePolynomialFunction2< ReturnT >::orderFromNParameters ( int nParameters )

inlinestaticinherited

Compute polynomial order from the number of parameters.

Only certain values of nParameters are acceptable, including: nParameters order 1 0 3 1 6 2 10 3 15 4 ...

Exceptions

lsst::pex::exceptions::InvalidParameterError

if nParameters is invalid

Definition at line 392 of file Function.h.

                                                     {
        int order = static_cast<int>(
                0.5 + ((-3.0 + (std::sqrt(1.0 + (8.0 * static_cast<double>(nParameters))))) / 2.0));
        if (nParameters != BasePolynomialFunction2::nParametersFromOrder(order)) {
            std::ostringstream os;
            os << "nParameters=" << nParameters << " invalid: order is not an integer";
            throw LSST_EXCEPT(lsst::pex::exceptions::InvalidParameterError, os.str());
        }
        return order;
    }

readFits() [1/6]

static std::shared_ptr< Function2< ReturnT > > lsst::afw::table::io::PersistableFacade< Function2< ReturnT > >::readFits ( fits::Fits & fitsfile )

inlinestaticinherited

Read an object from an already open FITS object.

Parameters

[in]

fitsfile

FITS object to read from, already positioned at the desired HDU.

Definition at line 183 of file Persistable.h.

readFits() [2/6]

static std::shared_ptr< Function< ReturnT > > lsst::afw::table::io::PersistableFacade< Function< ReturnT > >::readFits ( fits::Fits & fitsfile )

inlinestaticinherited

Read an object from an already open FITS object.

Parameters

[in]

fitsfile

FITS object to read from, already positioned at the desired HDU.

Definition at line 183 of file Persistable.h.

readFits() [3/6]

static std::shared_ptr< Function2< ReturnT > > lsst::afw::table::io::PersistableFacade< Function2< ReturnT > >::readFits ( fits::MemFileManager & manager, int hdu = fits::DEFAULT_HDU )

inlinestaticinherited

Read an object from a FITS file in memory.

Parameters

[in]	manager	Manager for the memory to read from.
[in]	hdu	HDU to read, where 0 is the primary. The special value of afw::fits::DEFAULT_HDU skips the primary HDU if it is empty.

Definition at line 205 of file Persistable.h.

readFits() [4/6]

static std::shared_ptr< Function< ReturnT > > lsst::afw::table::io::PersistableFacade< Function< ReturnT > >::readFits ( fits::MemFileManager & manager, int hdu = fits::DEFAULT_HDU )

inlinestaticinherited

Read an object from a FITS file in memory.

Parameters

[in]	manager	Manager for the memory to read from.
[in]	hdu	HDU to read, where 0 is the primary. The special value of afw::fits::DEFAULT_HDU skips the primary HDU if it is empty.

Definition at line 205 of file Persistable.h.

readFits() [5/6]

static std::shared_ptr< Function< ReturnT > > lsst::afw::table::io::PersistableFacade< Function< ReturnT > >::readFits ( std::string const & fileName, int hdu = fits::DEFAULT_HDU )

inlinestaticinherited

Read an object from a regular FITS file.

Parameters

[in]	fileName	Name of the file to read.
[in]	hdu	HDU to read, where 0 is the primary. The special value of afw::fits::DEFAULT_HDU skips the primary HDU if it is empty.

Definition at line 194 of file Persistable.h.

readFits() [6/6]

static std::shared_ptr< Function2< ReturnT > > lsst::afw::table::io::PersistableFacade< Function2< ReturnT > >::readFits ( std::string const & fileName, int hdu = fits::DEFAULT_HDU )

inlinestaticinherited

Read an object from a regular FITS file.

Parameters

[in]	fileName	Name of the file to read.
[in]	hdu	HDU to read, where 0 is the primary. The special value of afw::fits::DEFAULT_HDU skips the primary HDU if it is empty.

Definition at line 194 of file Persistable.h.

setParameter()

template<typename ReturnT >

void lsst::afw::math::Function< ReturnT >::setParameter ( unsigned int ind, double newValue )

inlineinherited

Set one function parameter without range checking.

Parameters

ind	index of parameter
newValue	new value for parameter

Definition at line 143 of file Function.h.

    {
        _isCacheValid = false;
        _params[ind] = newValue;
    }

setParameters()

template<typename ReturnT >

void lsst::afw::math::Function< ReturnT >::setParameters ( std::vector< double > const & params )

inlineinherited

Set all function parameters.

Exceptions

lsst::pex::exceptions::InvalidParameterError

if the wrong number of parameters is supplied.

Parameters

params

vector of function parameters

Definition at line 156 of file Function.h.

    {
        if (_params.size() != params.size()) {
            throw LSST_EXCEPT(
                    pexExcept::InvalidParameterError,
                    (boost::format("params has %d entries instead of %d") % params.size() % _params.size())
                            .str());
        }
        _isCacheValid = false;
        _params = params;
    }

toString()

template<typename ReturnT >

std::string lsst::afw::math::PolynomialFunction2< ReturnT >::toString ( std::string const & ) const

inlineoverridevirtual

Return a string representation of the function.

Returns

a string representation of the function

Reimplemented from lsst::afw::math::Function2< ReturnT >.

Definition at line 540 of file FunctionLibrary.h.

                                                               {
        std::ostringstream os;
        os << "PolynomialFunction2 [" << this->_order << "]: ";
        os << Function2<ReturnT>::toString(prefix);
        return os.str();
    }

write()

template<typename ReturnT >

void lsst::afw::math::PolynomialFunction2< ReturnT >::write ( afw::table::io::OutputArchiveHandle & handle ) const

overrideprotectedvirtual

Write the object to one or more catalogs.

The handle object passed to this function provides an interface for adding new catalogs and adding nested objects to the same archive (while checking for duplicates). See OutputArchiveHandle for more information.

Reimplemented from lsst::afw::table::io::Persistable.

Definition at line 239 of file FunctionLibrary.cc.

                                                                                 {
    PolynomialFunction2PersistenceHelper const keys(this->getNParameters());
    table::BaseCatalog catalog = handle.makeCatalog(keys.schema);
    keys.coefficients.assignVector(*catalog.addNew(), this->getParameters());
    handle.saveCatalog(catalog);
}

writeFits() [1/3]

void lsst::afw::table::io::Persistable::writeFits ( fits::Fits & fitsfile ) const

inherited

Write the object to an already-open FITS object.

Parameters

[in]

fitsfile

Open FITS object to write to.

Definition at line 18 of file Persistable.cc.

                                                    {
    OutputArchive archive;
    archive.put(this);
    archive.writeFits(fitsfile);
}

writeFits() [2/3]

void lsst::afw::table::io::Persistable::writeFits ( fits::MemFileManager & manager, std::string const & mode = "w" ) const

inherited

Write the object to a FITS image in memory.

Parameters

[in]	manager	Name of the file to write to.
[in]	mode	If "w", any existing file with the given name will be overwritten. If "a", new HDUs will be appended to an existing file.

Definition at line 29 of file Persistable.cc.

                                                                                    {
    fits::Fits fitsfile(manager, mode, fits::Fits::AUTO_CLOSE | fits::Fits::AUTO_CHECK);
    writeFits(fitsfile);
}

writeFits() [3/3]

void lsst::afw::table::io::Persistable::writeFits ( std::string const & fileName, std::string const & mode = "w" ) const

inherited

Write the object to a regular FITS file.

Parameters

[in]	fileName	Name of the file to write to.
[in]	mode	If "w", any existing file with the given name will be overwritten. If "a", new HDUs will be appended to an existing file.

Definition at line 24 of file Persistable.cc.

                                                                                  {
    fits::Fits fitsfile(fileName, mode, fits::Fits::AUTO_CLOSE | fits::Fits::AUTO_CHECK);
    writeFits(fitsfile);
}

Member Data Documentation

_isCacheValid

template<typename ReturnT >

bool lsst::afw::math::Function< ReturnT >::_isCacheValid

mutableprotectedinherited

Definition at line 186 of file Function.h.

_order

template<typename ReturnT >

int lsst::afw::math::BasePolynomialFunction2< ReturnT >::_order

protectedinherited

order of polynomial

Definition at line 431 of file Function.h.

_params

template<typename ReturnT >

std::vector<double> lsst::afw::math::Function< ReturnT >::_params

protectedinherited

Definition at line 185 of file Function.h.

---

The documentation for this class was generated from the following files:

• /j/snowflake/release/lsstsw/stack/lsst-scipipe-8.0.0/Linux64/afw/g5a732f18d5+53520f316c/include/lsst/afw/math/FunctionLibrary.h
• /j/snowflake/release/lsstsw/stack/lsst-scipipe-8.0.0/Linux64/afw/g5a732f18d5+53520f316c/src/math/Function.cc
• /j/snowflake/release/lsstsw/stack/lsst-scipipe-8.0.0/Linux64/afw/g5a732f18d5+53520f316c/src/math/FunctionLibrary.cc