ROOT::RDF::Experimental Namespace Reference

Classes
class	ProgressBarAction
class	ProgressHelper
	RDF progress helper. More...
class	RDatasetSpec
	The dataset specification for RDataFrame. More...
class	RMetaData
	Class behaving as a heterogenuous dictionary to store the metadata of a dataset. More...
class	RResultMap
class	RSample
	Class representing a sample which is a grouping of trees and their fileglobs, and, optionally, the sample's metadata information via the RMetaData object. More...

Typedefs
using	SnapshotPtr_t = ROOT::RDF::RResultPtr< ROOT::RDF::RInterface< ROOT::Detail::RDF::RLoopManager, void > >

Functions
void	AddProgressBar (ROOT::RDataFrame df)
	Add ProgressBar to an RDataFrame.
void	AddProgressBar (ROOT::RDF::RNode df)
	Add ProgressBar to a ROOT::RDF::RNode.
RDataFrame	FromRNTuple (ROOT::RNTuple *ntuple)
RDataFrame	FromRNTuple (std::string_view ntupleName, const std::vector< std::string > &fileNames)
RDataFrame	FromRNTuple (std::string_view ntupleName, std::string_view fileName)
ROOT::RDataFrame	FromSpec (const std::string &jsonFile)
	Factory method to create an RDataFrame from a JSON specification file.
template<typename T >
RResultMap< T >	VariationsFor (RResultPtr< T > resPtr)
	Produce all required systematic variations for the given result.
SnapshotPtr_t	VariationsFor (SnapshotPtr_t resPtr)

Typedef Documentation

SnapshotPtr_t

using ROOT::RDF::Experimental::SnapshotPtr_t = typedef ROOT::RDF::RResultPtr<ROOT::RDF::RInterface<ROOT::Detail::RDF::RLoopManager, void> >

Definition at line 269 of file RDFHelpers.hxx.

Function Documentation

AddProgressBar() [1/2]

void ROOT::RDF::Experimental::AddProgressBar

(

ROOT::RDataFrame

df

)

Add ProgressBar to an RDataFrame.

Parameters

[in]

df

RDataFrame for which ProgressBar is called.

This function adds a ProgressBar to display the event statistics in the terminal every m events and every n seconds, including elapsed time, currently processed file, currently processed events, the rate of event processing and an estimated remaining time (per file being processed). ProgressBar should be added after the dataframe object (df) is created first:

ROOT::RDataFrame df("tree", "file.root");
ROOT::RDF::Experimental::AddProgressBar(df);

For more details see ROOT::RDF::Experimental::ProgressHelper Class.

Definition at line 382 of file RDFHelpers.cxx.

AddProgressBar() [2/2]

void ROOT::RDF::Experimental::AddProgressBar

(

ROOT::RDF::RNode

df

)

Add ProgressBar to a ROOT::RDF::RNode.

Parameters

[in]

df

RDataFrame node at which ProgressBar is called.

The ProgressBar can be added not only at the RDataFrame head node, but also at any any computational node, such as Filter or Define.

Example usage:

ROOT::RDataFrame df("tree", "file.root");
auto df_1 = ROOT::RDF::RNode(df.Filter("x>1"));
ROOT::RDF::Experimental::AddProgressBar(df_1);

Definition at line 373 of file RDFHelpers.cxx.

FromRNTuple() [1/3]

ROOT::RDataFrame ROOT::RDF::Experimental::FromRNTuple

(

ROOT::RNTuple *

ntuple

)

Definition at line 760 of file RNTupleDS.cxx.

FromRNTuple() [2/3]

ROOT::RDataFrame ROOT::RDF::Experimental::FromRNTuple	(	std::string_view	ntupleName,
		const std::vector< std::string > &	fileNames
	)

Definition at line 755 of file RNTupleDS.cxx.

FromRNTuple() [3/3]

ROOT::RDataFrame ROOT::RDF::Experimental::FromRNTuple	(	std::string_view	ntupleName,
		std::string_view	fileName
	)

Definition at line 749 of file RNTupleDS.cxx.

FromSpec()

ROOT::RDataFrame ROOT::RDF::Experimental::FromSpec

(

const std::string &

jsonFile

)

Factory method to create an RDataFrame from a JSON specification file.

Create the RDataFrame from the dataset specification file.

Parameters

[in]	jsonFile	Path of the JSON file, which should follow the format described in https://github.com/root-project/root/issues/11624
[in]	jsonFile	Path to the dataset specification JSON file.

The input dataset specification JSON file must include a number of keys that describe all the necessary samples and their associated metadata information. The main key, "samples", is required and at least one sample is needed. Each sample must have at least one key "trees" and at least one key "files" from which the data is read. Optionally, one or more metadata information can be added, as well as the friend list information.

Example specification file JSON:

The following is an example of the dataset specification JSON file formatting:

{
   "samples": {
      "sampleA": {
         "trees": ["tree1", "tree2"],
         "files": ["file1.root", "file2.root"],
         "metadata": {"lumi": 1.0, }
      },
      "sampleB": {
         "trees": ["tree3", "tree4"],
         "files": ["file3.root", "file4.root"],
         "metadata": {"lumi": 0.5, }
      },
      ...
    },
}

Definition at line 1906 of file RDataFrame.cxx.

VariationsFor() [1/2]

template<typename T >

RResultMap< T > ROOT::RDF::Experimental::VariationsFor

(

RResultPtr< T >

resPtr

)

Produce all required systematic variations for the given result.

Parameters

[in]

resPtr

The result for which variations should be produced.

Returns

A RResultMap object with full variation names as strings (e.g. "pt:down") and the corresponding varied results as values.

A given input RResultPtr<T> produces a corresponding RResultMap<T> with a "nominal" key that will return a value identical to the one contained in the original RResultPtr. Other keys correspond to the varied values of this result, one for each variation that the result depends on. VariationsFor does not trigger the event loop. The event loop is only triggered upon first access to a valid key, similarly to what happens with RResultPtr.

If the result does not depend, directly or indirectly, from any registered systematic variation, the returned RResultMap will contain only the "nominal" key.

See RDataFrame's Vary method for more information and example usages.

Note

Currently, producing variations for the results of Display, Report and Snapshot actions is not supported.

Definition at line 219 of file RDFHelpers.hxx.

VariationsFor() [2/2]

ROOT::RDF::Experimental::SnapshotPtr_t ROOT::RDF::Experimental::VariationsFor

(

SnapshotPtr_t

resPtr

)

Definition at line 135 of file RDFHelpers.cxx.