ReadFile() incorrectly reads data in assigned file

[Charlie]

Hello,

I’m trying to use ReadFile() from TTree to plot data and I’m noticing that it’s not plotting the right values from the column that I selected to plot when I run my code. It’s reading the column as numbers in the range of 10^6, but when you look at the txt file in a text editor and under TScan(), they appear as they should. I will provide the list file in this post along with the code. ReadFile() has worked for me with a similar range of values that I’m trying to plot. Here is the code:

void RMS_mip_histogram ()
{
  TTree t0;
  t0.ReadFile("mip_w_RMS.gains","cell:a:x:y");
  t0.Draw("y:a>>h0");
  TH2F *h0 = (TH2F*) gROOT->FindObject("h0");
  h0->GetXaxis()->SetRangeUser(0,30);
  h0->GetYaxis()->SetRangeUser(0,2);

  TCanvas * c1 = new TCanvas("c1","c1",800,800);
  h0->Draw("CANDLEY6");

}

I hope I can get some help with this. Thanks in advance.

-Charlie Clark
mean_mip_histogram.C (2.2 KB)

_ROOT Version: ROOT 6.26/06
_Platform: MacOS

---

mip_w_RMS.txt (113.4 KB)

[dastudillo]

Check your data file, there are 21 entries with value above 10^6 in the second column, plus more entries in the thousands and tens of thousands, even a negative.

[Wile_E_Coyote]

t0.Scan("y:a", "a < 0. || a > 100.")

[dastudillo]

@Wile_E_Coyote If the file is being read incorrectly, this doesn’t help find the problem.

[Wile_E_Coyote]

@dastudillo You CAN open the file in a simple text editor and, e.g., inspect the line numbers (±1) shown by the “Scan”.

[Charlie]

@Wile_E_Coyote @dastudillo Thank you for your help.