#!/usr/bin/env python
# coding: utf-8

# # df024_Display
# Use the Display action to inspect entry values.
# 
# This tutorial shows how to use the Display action
# 
# 
# 
# 
# **Author:**  Enrico Guiraud, Danilo Piparo, Enric Tejedor Saavedra (CERN), Massimo Tumolo (Politecnico di Torino)  
# <i><small>This notebook tutorial was automatically generated with <a href= "https://github.com/root-project/root/blob/master/documentation/doxygen/converttonotebook.py">ROOTBOOK-izer</a> from the macro found in the ROOT repository  on Wednesday, April 17, 2024 at 11:07 AM.</small></i>

# In[1]:


import ROOT


# Setting up a Dataframe with some data

# In[2]:


ROOT.gInterpreter.ProcessLine('''
   unsigned long long y = 1;
   int x = 1;
   double w = 1;
   double z = 1;
   ROOT::RDataFrame df(10);
   auto d = df.Define("y", [&y]() { return y *= 100; }) // A column with ulongs
              .Define("x",
                      [&x]() {
                         return std::vector<int>({x++, x++, x++, x++});
                      })                                // A column with four-elements collection
              .Define("w", [&w]() { return w *= 1.8; }) // A column with doubles
              .Define("z", [&z]() {
                 z *= 1.1;
                 return std::vector<std::vector<double>>({{z, ++z}, {z, ++z}, {z, ++z}});
              }); // A column of matrices
''')

d = ROOT.d


# Preparing the RResultPtr<RDisplay> object with all columns and default number of entries

# In[3]:


d1 = d.Display("")


# Preparing the RResultPtr<RDisplay> object with two columns and default number of entries

# In[4]:


cols = ROOT.vector('string')(); cols.push_back("x"); cols.push_back("y");
d2 = d.Display(cols)


# Printing the short representations, the event loop will run

# In[5]:


print("The following is the representation of all columns with the default nr of entries")
d1.Print()
print("\n\nThe following is the representation of two columns with the default nr of entries")
d2.Print()


# Draw all canvases 

# In[6]:


from ROOT import gROOT 
gROOT.GetListOfCanvases().Draw()