This is a class to pass functions from ROOT to R.

TRFunctionImport class

The TRFunctionImport class lets you call R's functions to ROOT's environment
The object associated to this class have a set of overloaded operators to use the object like function

#include<TRInterface.h>
using namespace ROOT::R;
void Function()
{
  TRInterface &r = TRInterface::Instance();
  r.SetVerbose(1);
  ////////////////////////////////////////
  //defining functions to be used from R//
  ////////////////////////////////////////
  TRFunctionImport c("c");
  TRFunctionImport list("list");
  TRFunctionImport asformula("as.formula");
  TRFunctionImport nls("nls");
  TRFunctionImport confint("confint");
  TRFunctionImport summary("summary");
  TRFunctionImport print("print");
  TRFunctionImport plot("plot");
  TRFunctionImport lines("lines");
  TRFunctionImport devnew("dev.new");
  TRFunctionImport devoff("dev.off");
  TRFunctionImport min("min");
  TRFunctionImport max("max");
  TRFunctionImport seq("seq");
  TRFunctionImport predict("predict");
r<<"options(device='png')";//enable plot in png file
  ////////////////////////
  //doing the procedure //
  ////////////////////////
   TRObject xdata = c(-2,-1.64,-1.33,-0.7,0,0.45,1.2,1.64,2.32,2.9);
   TRObject ydata = c(0.699369,0.700462,0.695354,1.03905,1.97389,2.41143,1.91091,0.919576,-0.730975,-1.42001);
   TRDataFrame data;
   data["xdata"]=xdata;
   data["ydata"]=ydata;
   //fit = nls(ydata ~ p1*cos(p2*xdata) + p2*sin(p1*xdata), start=list(p1=1,p2=0.2)) <- R code
   TRObject fit = nls(asformula("ydata ~ p1*cos(p2*xdata) + p2*sin(p1*xdata)"),Label["data"]=data, Label["start"]=list(Label["p1"]=1,Label["p2"]=0.2));
   print(summary(fit));
   print(confint(fit));
   devnew("Fitting Regression");
   plot(xdata,ydata);
   TRObject xgrid=seq(min(xdata),max(xdata),Label["len"]=10);
   lines(xgrid,predict(fit,xgrid),Label["col"] = "green");
   devoff();
}

Output

Formula: ydata ~ p1 * cos(p2 * xdata) + p2 * sin(p1 * xdata)
Parameters:
   Estimate Std. Error t value Pr(>|t|)
p1 1.881851   0.027430   68.61 2.27e-12 ***
p2 0.700230   0.009153   76.51 9.50e-13 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1
Residual standard error: 0.08202 on 8 degrees of freedom
Number of iterations to convergence: 7
Achieved convergence tolerance: 2.189e-06
Waiting for profiling to be done...
        2.5%     97.5%
p1 1.8206081 1.9442365
p2 0.6794193 0.7209843

Users Guide

http://oproject.org/tiki-index.php?page=ROOT+R+Users+Guide
https://root.cern.ch/drupal/content/how-use-r-root-root-r-interface

Definition at line 120 of file TRFunctionImport.h.

Public Member Functions
	TRFunctionImport (const TString &name)
	TRFunctionImport constructor. More...

	TRFunctionImport (const TString &name, const TString &ns)
	TRFunctionImport constructor. More...

	TRFunctionImport (const TRFunctionImport &fun)
	TRFunctionImport copy constructor. More...

	TRFunctionImport (SEXP obj)
	TRFunctionImport constructor. More...

	TRFunctionImport (TRObject &obj)
	TRFunctionImport constructor. More...

	~TRFunctionImport ()

SEXP	operator() ()

Public Member Functions inherited from TObject
	TObject ()
	TObject constructor. More...

	TObject (const TObject &object)
	TObject copy ctor. More...

virtual	~TObject ()
	TObject destructor. More...

void	AbstractMethod (const char *method) const
	Use this method to implement an "abstract" method that you don't want to leave purely abstract. More...

virtual void	AppendPad (Option_t *option="")
	Append graphics object to current pad. More...

virtual void	Browse (TBrowser *b)
	Browse object. May be overridden for another default action. More...

ULong_t	CheckedHash ()
	Checked and record whether for this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object. More...

virtual const char *	ClassName () const
	Returns name of class to which the object belongs. More...

virtual void	Clear (Option_t *="")

virtual TObject *	Clone (const char *newname="") const
	Make a clone of an object using the Streamer facility. More...

virtual Int_t	Compare (const TObject *obj) const
	Compare abstract method. More...

virtual void	Copy (TObject &object) const
	Copy this to obj. More...

virtual void	Delete (Option_t *option="")
	Delete this object. More...

virtual Int_t	DistancetoPrimitive (Int_t px, Int_t py)
	Computes distance from point (px,py) to the object. More...

virtual void	Draw (Option_t *option="")
	Default Draw method for all objects. More...

virtual void	DrawClass () const
	Draw class inheritance tree of the class to which this object belongs. More...

virtual TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current selected pad for instance with: `gROOT->SetSelectedPad(gPad)`. More...

virtual void	Dump () const
	Dump contents of object on stdout. More...

virtual void	Error (const char method, const char msgfmt,...) const
	Issue error message. More...

virtual void	Execute (const char method, const char params, Int_t *error=0)
	Execute method on this object with the given parameter string, e.g. More...

virtual void	Execute (TMethod method, TObjArray params, Int_t *error=0)
	Execute method on this object with parameters stored in the TObjArray. More...

virtual void	ExecuteEvent (Int_t event, Int_t px, Int_t py)
	Execute action corresponding to an event at (px,py). More...

virtual void	Fatal (const char method, const char msgfmt,...) const
	Issue fatal error message. More...

virtual TObject *	FindObject (const char *name) const
	Must be redefined in derived classes. More...

virtual TObject *	FindObject (const TObject *obj) const
	Must be redefined in derived classes. More...

virtual Option_t *	GetDrawOption () const
	Get option used by the graphics system to draw this object. More...

virtual const char *	GetIconName () const
	Returns mime type name of object. More...

virtual const char *	GetName () const
	Returns name of object. More...

virtual char *	GetObjectInfo (Int_t px, Int_t py) const
	Returns string containing info about the object at position (px,py). More...

virtual Option_t *	GetOption () const

virtual const char *	GetTitle () const
	Returns title of object. More...

virtual UInt_t	GetUniqueID () const
	Return the unique object id. More...

virtual Bool_t	HandleTimer (TTimer *timer)
	Execute action in response of a timer timing out. More...

virtual ULong_t	Hash () const
	Return hash value for this object. More...

Bool_t	HasInconsistentHash () const
	Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e. More...

virtual void	Info (const char method, const char msgfmt,...) const
	Issue info message. More...

virtual Bool_t	InheritsFrom (const char *classname) const
	Returns kTRUE if object inherits from class "classname". More...

virtual Bool_t	InheritsFrom (const TClass *cl) const
	Returns kTRUE if object inherits from TClass cl. More...

virtual void	Inspect () const
	Dump contents of this object in a graphics canvas. More...

void	InvertBit (UInt_t f)

virtual Bool_t	IsEqual (const TObject *obj) const
	Default equal comparison (objects are equal if they have the same address in memory). More...

virtual Bool_t	IsFolder () const
	Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). More...

R__ALWAYS_INLINE Bool_t	IsOnHeap () const

virtual Bool_t	IsSortable () const

R__ALWAYS_INLINE Bool_t	IsZombie () const

virtual void	ls (Option_t *option="") const
	The ls function lists the contents of a class on stdout. More...

void	MayNotUse (const char *method) const
	Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary). More...

virtual Bool_t	Notify ()
	This method must be overridden to handle object notification. More...

void	Obsolete (const char method, const char asOfVers, const char *removedFromVers) const
	Use this method to declare a method obsolete. More...

void	operator delete (void *ptr)
	Operator delete. More...

void	operator delete[] (void *ptr)
	Operator delete []. More...

void *	operator new (size_t sz)

void *	operator new (size_t sz, void *vp)

void *	operator new[] (size_t sz)

void *	operator new[] (size_t sz, void *vp)

TObject &	operator= (const TObject &rhs)
	TObject assignment operator. More...

virtual void	Paint (Option_t *option="")
	This method must be overridden if a class wants to paint itself. More...

virtual void	Pop ()
	Pop on object drawn in a pad to the top of the display list. More...

virtual void	Print (Option_t *option="") const
	This method must be overridden when a class wants to print itself. More...

virtual Int_t	Read (const char *name)
	Read contents of object with specified name from the current directory. More...

virtual void	RecursiveRemove (TObject *obj)
	Recursively remove this object from a list. More...

void	ResetBit (UInt_t f)

virtual void	SaveAs (const char filename="", Option_t option="") const
	Save this object in the file specified by filename. More...

virtual void	SavePrimitive (std::ostream &out, Option_t *option="")
	Save a primitive as a C++ statement(s) on output stream "out". More...

void	SetBit (UInt_t f, Bool_t set)
	Set or unset the user status bits as specified in f. More...

void	SetBit (UInt_t f)

virtual void	SetDrawOption (Option_t *option="")
	Set drawing option for object. More...

virtual void	SetUniqueID (UInt_t uid)
	Set the unique object id. More...

virtual void	SysError (const char method, const char msgfmt,...) const
	Issue system error message. More...

R__ALWAYS_INLINE Bool_t	TestBit (UInt_t f) const

Int_t	TestBits (UInt_t f) const

virtual void	UseCurrentStyle ()
	Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked. More...

virtual void	Warning (const char method, const char msgfmt,...) const
	Issue warning message. More...

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
	Write this object to the current directory. More...

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
	Write this object to the current directory. More...

Protected Member Functions
	TRFunctionImport (const Rcpp::Function &fun)
	TRFunctionImport constructor for Rcpp::DataFrame. More...

Protected Member Functions inherited from TObject
virtual void	DoError (int level, const char location, const char fmt, va_list va) const
	Interface to ErrorHandler (protected). More...

void	MakeZombie ()

Protected Attributes
Rcpp::Function *	f

Friends
TRFunctionImport	Rcpp::as (SEXP)

SEXP	Rcpp::wrap (const TRFunctionImport &f)

class	TRInterface

Additional Inherited Members
Public Types inherited from TObject
enum	{ kIsOnHeap = 0x01000000, kNotDeleted = 0x02000000, kZombie = 0x04000000, kInconsistent = 0x08000000, kBitMask = 0x00ffffff }

enum	{ kSingleKey = BIT(0), kOverwrite = BIT(1), kWriteDelete = BIT(2) }

enum	EDeprecatedStatusBits { kObjInCanvas = BIT(3) }

enum	EStatusBits { kCanDelete = BIT(0), kMustCleanup = BIT(3), kIsReferenced = BIT(4), kHasUUID = BIT(5), kCannotPick = BIT(6), kNoContextMenu = BIT(8), kInvalidObject = BIT(13) }

Static Public Member Functions inherited from TObject
static Long_t	GetDtorOnly ()
	Return destructor only flag. More...

static Bool_t	GetObjectStat ()
	Get status of object stat flag. More...

static void	SetDtorOnly (void *obj)
	Set destructor only flag. More...

static void	SetObjectStat (Bool_t stat)
	Turn on/off tracking of objects in the TObjectTable. More...

#include <TRFunctionImport.h>

Inheritance diagram for ROOT::R::TRFunctionImport:

[legend]

Constructor & Destructor Documentation

◆ TRFunctionImport() [1/6]

ROOT::R::TRFunctionImport::TRFunctionImport ( const Rcpp::Function & fun )

inlineprotected

TRFunctionImport constructor for Rcpp::DataFrame.

Parameters

fun	raw function object from Rcpp

Definition at line 132 of file TRFunctionImport.h.

◆ TRFunctionImport() [2/6]

TRFunctionImport::TRFunctionImport ( const TString & name )

TRFunctionImport constructor.

Parameters

name	name of function from R

Definition at line 31 of file TRFunctionImport.cxx.

◆ TRFunctionImport() [3/6]

TRFunctionImport::TRFunctionImport	(	const TString &	name,
		const TString &	ns
	)

TRFunctionImport constructor.

Parameters

name	name of function from R
ns	namespace of function from R

Definition at line 37 of file TRFunctionImport.cxx.

◆ TRFunctionImport() [4/6]

TRFunctionImport::TRFunctionImport ( const TRFunctionImport & fun )

TRFunctionImport copy constructor.

Parameters

fun	other TRFunctionImport

Definition at line 25 of file TRFunctionImport.cxx.

◆ TRFunctionImport() [5/6]

TRFunctionImport::TRFunctionImport ( SEXP obj )

TRFunctionImport constructor.

Parameters

obj	raw R object

Definition at line 49 of file TRFunctionImport.cxx.

◆ TRFunctionImport() [6/6]

TRFunctionImport::TRFunctionImport ( TRObject & obj )

TRFunctionImport constructor.

Parameters

obj	TRObject object

Definition at line 43 of file TRFunctionImport.cxx.

◆ ~TRFunctionImport()

ROOT::R::TRFunctionImport::~TRFunctionImport ( )

inline

Definition at line 165 of file TRFunctionImport.h.

Member Function Documentation

◆ operator()()

SEXP ROOT::R::TRFunctionImport::operator() ( )

inline

Definition at line 169 of file TRFunctionImport.h.

Friends And Related Function Documentation

◆ Rcpp::as

TRFunctionImport Rcpp::as ( SEXP )

friend

◆ Rcpp::wrap

SEXP Rcpp::wrap ( const TRFunctionImport & f )

friend

◆ TRInterface

friend class TRInterface

friend

Definition at line 121 of file TRFunctionImport.h.

Member Data Documentation

◆ f

Rcpp::Function* ROOT::R::TRFunctionImport::f

protected

Definition at line 126 of file TRFunctionImport.h.

Libraries for ROOT::R::TRFunctionImport:

[legend]

TRFunctionImport class

Users Guide

Public Member Functions

Protected Member Functions

Protected Attributes

Friends

Additional Inherited Members

Constructor & Destructor Documentation

◆ TRFunctionImport() [1/6]

◆ TRFunctionImport() [2/6]

◆ TRFunctionImport() [3/6]

◆ TRFunctionImport() [4/6]

◆ TRFunctionImport() [5/6]

◆ TRFunctionImport() [6/6]

◆ ~TRFunctionImport()

Member Function Documentation

◆ operator()()

Friends And Related Function Documentation

◆ Rcpp::as

◆ Rcpp::wrap

◆ TRInterface

Member Data Documentation

◆ f