thanks for your fast reply. If i understand correctly, you claim that
changing
TH1F* histo(TH1F("histo","Histogram of Gluino Condensate",
300,10,12));
to
TH1F* histo = new TH1F("histo","Histogram of Gluino Condensate",
300,10,12);
resolves the problem.
Well, i tested it myself and found the same wrong output:
[theol03] ~/results/root $ mist.exe
*******************************************
* *
* W E L C O M E to R O O T *
* *
* Version 2.00/12 9 October 1998 *
* *
* You are welcome to visit our Web site *
* http://root.cern.ch *
* *
*******************************************
CINT/ROOT C/C++ Interpreter version 5.13.75, Sep 23 1998
Type ? for help. Commands must be C++ statements.
Enclose multiple statements between { }.
using data in range 28104 1.04858e+06
28104.000000
1048576.000000
root [0] printf("%f\n", histo->GetRMS());
0.099994
root [1]
It may be necessary to COMPILE the program, not to use it as a macro,
since the RMS is given correctly in interactive mode (see above!) !
BTW: as far as i know C++ the original line
TH1F* histo(new TH1F(...));
is a perfectly valid way of initializing a variable, in fact, it appears
to me as the standard way in C++ programming.
On 20 Oct, Rene Brun wrote:
> Joerg,
> In your example below, you have an error when creating the TH1F *histo.
> I have tested with the variant macro that Root behaves correctly with
> your example.
>
> Rene Brun
>
> {
> #include <iostream.h>
> // estimate range for plot
> TF1 *func = new TF1("func","exp(-0.5*((x-11.0)/0.1)^2)");
> TH1F* histo = new TH1F("histo","Histogram of Gluino Condensate",
> 300,10,12);
> histo->FillRandom("func",1024*1024);
> cout << "using data in range " << " "
> << histo->GetMean() << " "
> << histo->GetRMS()<< endl;
> printf("%f\n", histo->GetMean());
> printf("%f\n", histo->GetRMS());
> }
>