Problem in reading ascii file

ROOT
1

Dear Developers,

I am trying to plot 4th column of “inputs.lhco” file and when i run “input.c” file i get following error

"Error in : unexpected character or eof found "

Kindly help me in solving this issue.
Thanks.

Regards,
Nab
nab.zip (1.1 MB)

2

Some lines in your “inputs.lhco” file have 3 numbers while another lines have 11 and your “input.c” macro is not able to deal with it (it expects 5 numbers per line).

3

I have done it with 11 numbers per line but it is giving same error.

4

Yes some lines are having just 3 numbers and others having 11. How to deal with this kind of file?

5

In order to understand what this data file contains and how to read it, you need to talk to the author of this file.

6

Assuming:

  1. you are on Linux
  2. you want to skip lines starting with 0 (line with 3 numbers only ).

Then the following macro will do the job:

{
   gSystem->Exec("cat inputs.lhco | sed -e 's/^  0/# 0/' > inputs.lhco2");
   TNtuple t("t","test","h:a:b:c:m:v6:v7:v8:v9:v10:v11");
   t.ReadFile("inputs.lhco2");
   TCanvas *c1 = new TCanvas("c1","c1",600,400);
   TFile *mfile = new TFile ("input2.4.root","RECREATE");
   t.Write("t");
   t.Draw("a");
}
7

Thank you so much for your time. This is working now.

Cheers,
Nab

8

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