How can I make a histogram with a .csv file?

[maveir]

Hello,

I’m new to ROOT, and was hoping that someone could help me out. My goal is to be able to create a histogram from data stored in a .csv file. But I don’t know how to convert a .csv file to a .txt or .dat file.

Does anyone know how to do this using ROOT?

Thanks!

[couet]

Converting csv to root

Sorry that i forgot to include some of the code i wrote. I only manage wrote the part that convert to root. (note: from TBrowser() I only see the name of the tree so i figure i must have done something wrong) void convertCSV() { TString dir = gSystem->UnixPathName(__FILE__); dir.ReplaceAll("convertCSV.C",""); dir.ReplaceAll("/./","/"); ifstream in; in.open(Form("%stestdata.csv",dir.Data())); Int_t nlines = 20; Int_t n,Alarm101,Alarm102,Alarm103,Alarm104,Alarm105,Alarm106,A…

[pcanal]

Try

auto tree = TTree::ReadFile(filename,"x:y:z");
tree->Draw("x");

Cheers,
Philippe.