Logo ROOT   6.19/01
Reference Guide
ROOT::RDF Namespace Reference

Namespaces

 Internal
 

Classes

class  RArrowDS
 RDataFrame data source class to interface with Apache Arrow. More...
 
class  RCsvDS
 RDataFrame data source class for reading CSV files. More...
 
class  RCutFlowReport
 
class  RDataSource
 
RDataSource defines an API that RDataFrame can use to read arbitrary data formats. More...
 
class  RDisplay
 This class is the textual representation of the content of a columnar dataset. More...
 
class  RInterface
 The public interface to the RDataFrame federation of classes. More...
 
class  RLazyDS
 A RDataSource implementation which is built on top of result proxies. More...
 
class  RResultPtr
 Smart pointer for the return type of actions. More...
 
class  RRootDS
 
struct  RSnapshotOptions
 A collection of options to steer the creation of the dataset on file. More...
 
class  RSqliteDS
 
RSqliteDS is an RDF data source implementation for SQL result sets from sqlite3 files. More...
 
class  RTrivialDS
 
class  TCutInfo
 
class  TH1DModel
 A struct which stores the parameters of a TH1D. More...
 
class  TH2DModel
 A struct which stores the parameters of a TH2D. More...
 
class  TH3DModel
 A struct which stores the parameters of a TH3D. More...
 
class  TProfile1DModel
 A struct which stores the parameters of a TProfile. More...
 
class  TProfile2DModel
 A struct which stores the parameters of a TProfile2D. More...
 

Typedefs

using RNode = RInterface<::ROOT::Detail::RDF::RNodeBase, void >
 
template<typename T >
using TResultProxy = RResultPtr< T >
 

Functions

template<typename NodeType >
RNode AsRNode (NodeType node)
 Cast a RDataFrame node to the common type ROOT::RDF::RNode. More...
 
int getNRecords (std::shared_ptr< arrow::Table > &table, std::vector< std::string > &columnNames)
 
RDataFrame MakeArrowDataFrame (std::shared_ptr< arrow::Table > table, std::vector< std::string > const &columns)
 Factory method to create a Apache Arrow RDataFrame. More...
 
RDataFrame MakeCsvDataFrame (std::string_view fileName, bool readHeaders=true, char delimiter=',', Long64_t linesChunkSize=-1LL)
 Factory method to create a CSV RDataFrame. More...
 
template<typename... ColumnTypes>
RDataFrame MakeLazyDataFrame (std::pair< std::string, RResultPtr< std::vector< ColumnTypes >>> &&... colNameProxyPairs)
 Factory method to create a Lazy RDataFrame. More...
 
RDataFrame MakeRootDataFrame (std::string_view treeName, std::string_view fileNameGlob)
 
RDataFrame MakeSqliteDataFrame (std::string_view fileName, std::string_view query)
 Factory method to create a SQlite RDataFrame. More...
 
RInterface< RDFDetail::RLoopManager, RTrivialDSMakeTrivialDataFrame (ULong64_t size, bool skipEvenEntries=false)
 
template<typename F , typename Args = typename ROOT::TypeTraits::CallableTraits<typename std::decay<F>::type>::arg_types_nodecay, typename Ret = typename ROOT::TypeTraits::CallableTraits<typename std::decay<F>::type>::ret_type>
auto Not (F &&f) -> decltype(RDFInternal::NotHelper(Args(), std::forward< F >(f)))
 Given a callable with signature bool(T1, T2, ...) return a callable with same signature that returns the negated result. More...
 
template<class T1 , class T2 >
bool operator!= (const RResultPtr< T1 > &lhs, const RResultPtr< T2 > &rhs)
 
template<class T1 >
bool operator!= (const RResultPtr< T1 > &lhs, std::nullptr_t rhs)
 
template<class T1 >
bool operator!= (std::nullptr_t lhs, const RResultPtr< T1 > &rhs)
 
template<class T1 , class T2 >
bool operator== (const RResultPtr< T1 > &lhs, const RResultPtr< T2 > &rhs)
 
template<class T1 >
bool operator== (const RResultPtr< T1 > &lhs, std::nullptr_t rhs)
 
template<class T1 >
bool operator== (std::nullptr_t lhs, const RResultPtr< T1 > &rhs)
 
template<std::size_t N, typename T , typename F >
auto PassAsVec (F &&f) -> RDFInternal::PassAsVecHelper< std::make_index_sequence< N >, T, F >
 PassAsVec is a callable generator that allows passing N variables of type T to a function as a single collection. More...
 
template<typename NodeType >
std::string SaveGraph (NodeType node)
 Create a graphviz representation of the dataframe computation graph, return it as a string. More...
 
template<typename NodeType >
void SaveGraph (NodeType node, const std::string &outputFile)
 Create a graphviz representation of the dataframe computation graph, write it to the specified file. More...
 
void splitInEqualRanges (std::vector< std::pair< ULong64_t, ULong64_t >> &ranges, int nRecords, unsigned int nSlots)
 

Typedef Documentation

◆ RNode

◆ TResultProxy

template<typename T >
using ROOT::RDF::TResultProxy = typedef RResultPtr<T>

Definition at line 18 of file TResultProxy.hxx.

Function Documentation

◆ AsRNode()

template<typename NodeType >
RNode ROOT::RDF::AsRNode ( NodeType  node)

Cast a RDataFrame node to the common type ROOT::RDF::RNode.

Parameters
[in]Anynode of a RDataFrame graph

Definition at line 144 of file RDFHelpers.hxx.

◆ getNRecords()

int ROOT::RDF::getNRecords ( std::shared_ptr< arrow::Table > &  table,
std::vector< std::string > &  columnNames 
)

Definition at line 531 of file RArrowDS.cxx.

◆ MakeArrowDataFrame()

RDataFrame ROOT::RDF::MakeArrowDataFrame ( std::shared_ptr< arrow::Table >  table,
std::vector< std::string > const &  columnNames 
)

Factory method to create a Apache Arrow RDataFrame.

Creates a RDataFrame using an arrow::Table as input.

Parameters
[in]tablean apache::arrow table to use as a source.
[in]tablethe arrow Table to observe.
[in]columnNamesthe name of the columns to use In case columnNames is empty, we use all the columns found in the table

Definition at line 587 of file RArrowDS.cxx.

◆ MakeCsvDataFrame()

RDataFrame ROOT::RDF::MakeCsvDataFrame ( std::string_view  fileName,
bool  readHeaders = true,
char  delimiter = ',',
Long64_t  linesChunkSize = -1LL 
)

Factory method to create a CSV RDataFrame.

Parameters
[in]fileNamePath of the CSV file.
[in]readHeaderstrue if the CSV file contains headers as first row, false otherwise (default true).
[in]delimiterDelimiter character (default ',').

Definition at line 475 of file RCsvDS.cxx.

◆ MakeLazyDataFrame()

template<typename... ColumnTypes>
RDataFrame ROOT::RDF::MakeLazyDataFrame ( std::pair< std::string, RResultPtr< std::vector< ColumnTypes >>> &&...  colNameProxyPairs)

Factory method to create a Lazy RDataFrame.

Parameters
[in]colNameProxyPairsthe series of pairs to describe the columns of the data source, first element of the pair is the name of the column and the second is the RResultPtr to the column in the parent data frame.

Definition at line 28 of file RLazyDS.hxx.

◆ MakeRootDataFrame()

RDataFrame ROOT::RDF::MakeRootDataFrame ( std::string_view  treeName,
std::string_view  fileNameGlob 
)

Definition at line 163 of file RRootDS.cxx.

◆ MakeSqliteDataFrame()

RDataFrame ROOT::RDF::MakeSqliteDataFrame ( std::string_view  fileName,
std::string_view  query 
)

Factory method to create a SQlite RDataFrame.

Parameters
[in]fileNamePath of the sqlite file.
[in]querySQL query that defines the data set.

Definition at line 574 of file RSqliteDS.cxx.

◆ MakeTrivialDataFrame()

RInterface< RDFDetail::RLoopManager, RTrivialDS > ROOT::RDF::MakeTrivialDataFrame ( ULong64_t  size,
bool  skipEvenEntries = false 
)

Definition at line 92 of file RTrivialDS.cxx.

◆ Not()

template<typename F , typename Args = typename ROOT::TypeTraits::CallableTraits<typename std::decay<F>::type>::arg_types_nodecay, typename Ret = typename ROOT::TypeTraits::CallableTraits<typename std::decay<F>::type>::ret_type>
auto ROOT::RDF::Not ( F &&  f) -> decltype(RDFInternal::NotHelper(Args(), std::forward<F>(f)))

Given a callable with signature bool(T1, T2, ...) return a callable with same signature that returns the negated result.

The callable must have one single non-template definition of operator(). This is a limitation with respect to std::not_fn, required for interoperability with RDataFrame.

Definition at line 80 of file RDFHelpers.hxx.

◆ operator!=() [1/3]

template<class T1 , class T2 >
bool ROOT::RDF::operator!= ( const RResultPtr< T1 > &  lhs,
const RResultPtr< T2 > &  rhs 
)

Definition at line 309 of file RResultPtr.hxx.

◆ operator!=() [2/3]

template<class T1 >
bool ROOT::RDF::operator!= ( const RResultPtr< T1 > &  lhs,
std::nullptr_t  rhs 
)

Definition at line 327 of file RResultPtr.hxx.

◆ operator!=() [3/3]

template<class T1 >
bool ROOT::RDF::operator!= ( std::nullptr_t  lhs,
const RResultPtr< T1 > &  rhs 
)

Definition at line 333 of file RResultPtr.hxx.

◆ operator==() [1/3]

template<class T1 , class T2 >
bool ROOT::RDF::operator== ( const RResultPtr< T1 > &  lhs,
const RResultPtr< T2 > &  rhs 
)

Definition at line 303 of file RResultPtr.hxx.

◆ operator==() [2/3]

template<class T1 >
bool ROOT::RDF::operator== ( const RResultPtr< T1 > &  lhs,
std::nullptr_t  rhs 
)

Definition at line 315 of file RResultPtr.hxx.

◆ operator==() [3/3]

template<class T1 >
bool ROOT::RDF::operator== ( std::nullptr_t  lhs,
const RResultPtr< T1 > &  rhs 
)

Definition at line 321 of file RResultPtr.hxx.

◆ PassAsVec()

template<std::size_t N, typename T , typename F >
auto ROOT::RDF::PassAsVec ( F &&  f) -> RDFInternal::PassAsVecHelper<std::make_index_sequence<N>, T, F>

PassAsVec is a callable generator that allows passing N variables of type T to a function as a single collection.

PassAsVec<N, T>(func) returns a callable that takes N arguments of type T, passes them down to function func as an initializer list {t1, t2, t3,..., tN} and returns whatever f({t1, t2, t3, ..., tN}) returns.

Note that for this to work with RDataFrame the type of all columns that the callable is applied to must be exactly T. Example usage together with RDataFrame ("varX" columns must all be float variables):

bool myVecFunc(std::vector<float> args);
df.Filter(PassAsVec<3, float>(myVecFunc), {"var1", "var2", "var3"});

Definition at line 100 of file RDFHelpers.hxx.

◆ SaveGraph() [1/2]

template<typename NodeType >
std::string ROOT::RDF::SaveGraph ( NodeType  node)

Create a graphviz representation of the dataframe computation graph, return it as a string.

Parameters
[in]nodeany node of the graph. Called on the head (first) node, it prints the entire graph. Otherwise, only the branch the node belongs to.

Definition at line 113 of file RDFHelpers.hxx.

◆ SaveGraph() [2/2]

template<typename NodeType >
void ROOT::RDF::SaveGraph ( NodeType  node,
const std::string &  outputFile 
)

Create a graphviz representation of the dataframe computation graph, write it to the specified file.

Parameters
[in]nodeany node of the graph. Called on the head (first) node, it prints the entire graph. Otherwise, only the branch the node belongs to.
[in]outputFilefile where to save the representation.

Definition at line 125 of file RDFHelpers.hxx.

◆ splitInEqualRanges()

void ROOT::RDF::splitInEqualRanges ( std::vector< std::pair< ULong64_t, ULong64_t >> &  ranges,
int  nRecords,
unsigned int  nSlots 
)

Definition at line 515 of file RArrowDS.cxx.