How to decrease verbosity

ROOT
1

Hello everybody,

I have a root script toto.C and I open it like this :
root toto.C
I would like to suppress this default echo
Processing toto.C…
and also this one
Info in TCanvas::MakeDefCanvas: created default TCanvas with name c1

Is there the way change the root verbosity ?

By advance thank you
Olivier

2

root -b -q -l toto.C >& /dev/null

3

Thank you PePe for the answer.
but in this case stdout and stderr is going to /dev/null
I thought something like
root -b -q -l toto.C 2>/dev/null
but is not working #-o

4

It is working … simply the messages that you see come from stdout (i.e. 1), not from stderr (i.e. 2).
You can get rid of the canvas related message if you add into your “toto.C” something like (somewhere before the first “draw” command):
new TCanvas(“c1”, “c1”);
You can get rid of the “processing” message if you run your macro using:
echo ‘gROOT->LoadMacro(“toto.C”); toto(); gSystem->Exit(0);’ | root -b -l
See also [url]Compile and run from command prompt

5

ok I understand thank you.
Then stdout of my .C will go also in the /dev/null :frowning:
The only solution I see is to change in my .C the cout in cerr and to
do what you suggested
Thank you
Oliver

6

by the way this work perfectly

echo ‘gROOT->LoadMacro(“toto.C”); toto(); gSystem->Exit(0);’ | root -b -l

thank you
Olivier

7

Hi,

Yes, to prevent the print of the Info message do: gErrorIgnoreLevel = kWarning;

Cheers,
Philippe.

8

Hello Philippe,

thank you I was looking for something like this.
But unfortunately it seems it is not working … :frowning:
I still have this “Processing …” message
Olivier

9

Hi,

To suppress the ‘Processing’ message you need to have a rootlogon.C file containing:{ gPrintViaErrorHandler = kTRUE; gErrorIgnoreLevel = kWarning; }(however this will also suppress all other message send via ROOT’s Printf).

Cheers,
Philippe.

10

yes it works perfectly :smiley:
Thank you very much
cheers
Olivier

11

It got rid of not only the warnings but also the fit output, even though I am not using a quiet mode, just options “SIEM”. I would like to have only these output below:

FCN=7.24136 FROM MINOS STATUS=SUCCESSFUL 586 CALLS 5975 TOTAL
EDM=2.22571e-06 STRATEGY= 1 ERROR MATRIX UNCERTAINTY 6.8 per cent
EXT PARAMETER STEP FIRST
NO. NAME VALUE ERROR SIZE DERIVATIVE
1 p0 1.94920e-10 5.80194e-10 -8.07072e-04 -3.09127e-03
2 p1 6.06819e-02 2.09887e+00 -2.31920e-04 1.06478e-02
3 p2 -1.85090e+00 2.22413e-01 -3.94713e-06 2.84732e-02
4 p3 1.35383e-01 2.10279e-01 2.10279e-01 -3.64646e-04

and get rid of the warning:
NEW MINIMUM FOUND. GO BACK TO MINIMIZATION STEP.

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