I am having trouble reading csv file and making a histogram using pyroot. Here’s my code: 1 import ROOT 2 import csv 3 import array 4 import numpy 5 #canvas = ROOT.TCanvas("canvas", "canvas title", 800, 600) 6 7 infilename = 'prac_data.csv' 8 9 hist = ROOT.TH1F("variable", "Tit…

Wikipedia → Comma-separated values (CSV)

Hi @TheScientist , I think what @Wile_E_Coyote is hinting at is that your file is not in a standard CSV format, so you are probably reading broken strings in your i variable and then hist.Fill(i) does not know how to Fill hist with i. Printing the value of i should show what’s going on. Cheers, E…

For that it’s enough to go through a dictionary of numpy arrays and use MakeNumpyDataFrame, see e.g. Saving pandas dataframe as TTree with RDataframe - #2 by swunsch . It works as long as data is flat (one value per cell): arr_dict = {c: np.array(pandas_df[c]) for c in pandas_df} root_df = ROOT.RD…

Home | News | Documentation | Download | Privacy Notice

ROOT Forum

Reading csv file using PyROOT

Newbie

Wile_E_Coyote August 3, 2022, 8:03am 4

@eguiraud

Data Structure Error while Converting CSV file to ROOT file Newbie

@eguiraud So, maybe one just needs a conversation from a “pandas” object (loaded into RAM with “pandas.read_json”) to a “RDataFrame” object.

show post in topic

Home
Categories
Guidelines
Terms of Service
Privacy Policy

Powered by Discourse, best viewed with JavaScript enabled