http://blog.gmane.org/gmane.comp.lang.c++.root hourly 1 1901-01-01T00:00+00:00 http://gmane.org/img/gmane-25t.png http://gmane.org http://comments.gmane.org/gmane.comp.lang.c++.root/15208 <pre></pre> Marek Sirendi 2013-05-16T15:46:07 http://comments.gmane.org/gmane.comp.lang.c++.root/15205 <pre>Hello dear ROOTers, I found a bug in TMatrixTBase using Option "F" for fortran representation in the method GetMatrix2Array(Element *data,Option_t *option). When I get tha matrix's data in an array with fortran representation and I try to create a matrix again using TMatrixT(nrows,ncols,*data,"F"), the matrix is corrupted. I attach the macro to test the bug and the patch. Thanks. </pre> Omar Andrés Zapata Mesa 2013-05-13T16:35:39 http://comments.gmane.org/gmane.comp.lang.c++.root/15199 <pre>Hello, How can I set the X axis title of a stack histogram. I have tried the usual SetTitle on the stack histogram, have also set two of the histogram in the stack, but I don't manage. Many thanks, Pilar </pre> Pilar Casado 2013-05-09T07:58:23 http://comments.gmane.org/gmane.comp.lang.c++.root/15197 <pre> Dear ROOTers, I'm using TTimer for VMEbus readout. As I learned, the minimum time resolution is 10ms as it is defined in TSystem.h - kItimerResolution = 10 // interval-timer resolution in ms Question: is it O.K. if one changes it to 1ms? Or is there some other method to decrease time interval? Best regards Irakli * * * * * * * * * * * * * * * Dr. Irakli Keshelashvili Department of Physics University of Basel Klingelbergstrasse 82, CH-4056 Basel, Switzerland Tel. +41 6126 73775 (Office) +41 7887 06657 (Mobile) Fax: +41 6126 73784 * * * * * * * * * * * * * * * </pre> Irakli Keshelashvili 2013-05-07T11:36:44 http://comments.gmane.org/gmane.comp.lang.c++.root/15193 <pre>Dear root expert, I'm using root version 5.34/05 14 February 2013 I would need to retrieve the list of histograms from a THStack histogram and add them into another histogram. I'm trying to do it in this way by I get the complain you can see at the end. How can I do it? Many thanks, Pilar TH1F * h_signalf = new TH1F("h_signalf","h_signalf",50,0.,500.); TList *thisList = h_stack-&gt;GetHists(); TObjLink *lnk = thisList-&gt;FirstLink(); while (lnk) { //h_signalf-&gt;Add( (TH1F*) lnk-&gt;GetObject()); h_signalf-&gt;Add( (TH1F*) lnk); lnk = lnk-&gt;Next(); } -------------------------------- Error: Error: Can't call TObjLink::Next() in current scope KolmoTest.C:45: Possible candidates are... (in TObjLink) </pre> Maria Pilar Casado 2013-05-03T13:29:14 http://comments.gmane.org/gmane.comp.lang.c++.root/15186 <pre>dear experts, I am trying to submit again this question to which i would be grateful if someone could confirm the bottom approach. thanks in advance. I discussed this with several people, but I would need a confirmation that what i am doing is consistent enough. Basically, I am trying to extract some single source systematic uncertainty associated to one measurement. In order to extract the different systematics, I am proceeding as follow: 1) start with the histogram templates for signal (nominal and systematics) and data driven background and produce the Roofit workspace using the Histfactory machinery. 2) fix all nuisance parameters to zero, fit and extract the 68% confidence interval. -&gt; This is the nominal signal strength factor, that i label: mu_nom_c, mu_nom_u, mu_nom_d (central, upper, lower) 3) leave all nuisance parameters free within [-2,2], perform the fit and extract again the associated 68% confidence interval. -&gt; I label these: mu_sys_c, mu_sys_u, mu_sys_d (central, upper, lower) -&gt;</pre> Nabil Ghodbane 2013-05-02T16:02:21 http://comments.gmane.org/gmane.comp.lang.c++.root/15160 <pre>Hello, I found an article describing how to unsubscribe to roottalk: http://root.cern.ch/phpBB3/viewtopic.php?f=7&amp;t=11954 But the majordomo&lt; at &gt;root.cern.ch system replies with "unknown list 'roottalk'" Can some please tell me how to unsubscribe from roottalk? I have a number of email aliases that I can no longer send from (but which are being forwarded to my current address). I need to remove all of these from the roottalk list. thanks, </pre> Doug Schouten 2013-04-26T16:04:34 http://comments.gmane.org/gmane.comp.lang.c++.root/15158 <pre>Today ROOT has moved to Git for version control. We have made the change because Git offers many benefits over Subversion. Basically all large Open Source projects have preceded us in this move. For more details about the why, how and where see this presentation: https://indico.cern.ch/conferenceDisplay.py?confId=246803 A detailed Git HowTo (http://root.cern.ch/drupal/content/git-howto) has been added to the ROOT website. To checkout the ROOT sources, clone in Git parlance, do: git clone http://root.cern.ch/git/root.git For the rest, in respect to building ROOT, nothing has changed. Cheers, Fons. </pre> Fons Rademakers 2013-04-26T15:23:59 http://comments.gmane.org/gmane.comp.lang.c++.root/15152 <pre>Hello, I am trying to plot the intervals/range in root. I mean I have say 10 points and I got 10 intervals of that point like following 100 0.5-1.5 200 0.6-1.8 300 0.7-2.3 ........ like this Actually I am trying to see how much intervals goes on increasing when I increase the points. Any suggestion is appreciated as what would be the best way to plot which gives the idea of the the increase in intervals as we go high and high in points. Thanks </pre> Dr. Harinder Singh Bawa 2013-04-26T08:34:55 http://comments.gmane.org/gmane.comp.lang.c++.root/15149 <pre>hi i am facing some troubles while running a script using the screen bash command. It may nothing to do with these forum but i ll be grateful if someone give me a hint. i run the script in a direct manner, just that when i try to run the program under the screen command it doesn't find the libCore.so library I need it because im using ssh conextion and i need to keep running the program even if i close the ssh connection. thanks </pre> Israel Ariel Gonzalez Medina 2013-04-24T19:35:32 http://comments.gmane.org/gmane.comp.lang.c++.root/15145 <pre>Dear Root Expert, I'm facing a weird behavior when I'm trying to plot with the option "3" a TGraphAsymmErrors object. In fact not all the points range are filled, but for example in the simple case I attached no filled region is present before 0, while if I draw the same graph with the option "p" all the points are displaced. Am I missing something in the way the drawing is working? You can find in attachment a short script reproducing the "problem", and two pdf files with the graph plotted with option "3" and "p". Can you suggest me the correct way to obtain my band-plot? Thanks a lot in advance, Barbara ============================================================= Barbara Storaci Universität Zürich CERN, office 13-1-034 CH-1211 Geneve Postbox: F26110 Tel: +41 (0) 227679942 Email: Barbara.Storaci&lt; at &gt;cern.ch&lt;mailto:Barbara.Storaci&lt; at &gt;cern.ch&gt; ============================================================= </pre> Barbara Storaci 2013-04-24T09:41:43 http://comments.gmane.org/gmane.comp.lang.c++.root/15137 <pre>Dear root experts, I have the following piece of code: --------------------------------------------------------- #include &lt;string&gt; #include &lt;iomanip&gt; #include "AtlasStyle.C" #include "AtlasUtils.C" void StackPlots(){ //#ifdef __CINT__ // gROOT-&gt;LoadMacro("AtlasStyle.C"); // gROOT-&gt;LoadMacro("AtlasUtils.C"); //#endif SetAtlasStyle(); gStyle-&gt;SetPadRightMargin(0.15); gStyle-&gt;SetPalette(1); TFile *file_data=new TFile("output_data.root", "READ"); } ------------------------------------------------------------ I'm using root version 5.34/05 14 Feb. 2013 When I try to compile I get the error: ------------------------------------------------------------ /nfs/pic.es/user/c/casado/HpTriggerMar2013/./StackPlots.C:17: error: invalid use of incomplete type âstruct TFileâ /cvmfs/atlas.cern.ch/repo/ATLASLocalRootBase/x86_64/root/5.34.05-x86_64-slc5-gcc4.3/include/TUUID.h:39: error: forward declaration of âstruct TFileâ --------------------------------------------------------------- How should I </pre> Pilar Casado 2013-04-21T07:13:14 http://comments.gmane.org/gmane.comp.lang.c++.root/15133 <pre>Hello I am installing root in cygwin (installed on Win7). I downloaded .tar file and untarred in /usr/local dir. Setup ROOTSYS, PATH and LD_LIBRARY_PATH. Everything seems to be well, but when I give command as root It displays Welcome logo but Root prompt doesnt come. Initially it looks like its taking time but I waiting for 5-10 min and looks like it doesnt get through. Can anybody suggest what could be the problem? I can kill session using CTRL C but again when I type root command, it gets hanged after root logo. Harinder </pre> Dr. Harinder Singh Bawa 2013-04-19T15:10:21 http://comments.gmane.org/gmane.comp.lang.c++.root/15130 <pre>Hi, I have difficulty with the fitting the data by a power function. I have TF1 *myfit = new TF1("myfit","[0]*pow(x,[1])*exp(x*[2])", 0, 2.5); myfit-&gt;SetParName(0,"alpha"); myfit-&gt;SetParName(1,"beta"); myfit-&gt;SetParName(2,"gamma"); ... gr = new TGraph(18, x, y); gr-&gt;Fit("myfit", "w"); I get the result **************************************** Minimizer is Minuit / Migrad Chi2 = 4.67788e+23 NDf = 15 Edm = -nan NCalls = 143 alpha = 30303 +/- 4729.9 beta = 0 +/- 0 gamma = 6.81021 +/- 0.0548613 beta always = 0 where I have a mistake? thanks. </pre> Anatoliy Khmelevskiy 2013-04-18T14:06:08 http://comments.gmane.org/gmane.comp.lang.c++.root/15128 <pre>Dear All, of course Nick has not really been banned for life and his offense was not that severe and advocated a good cause. Nick has apologized about using the list, without prior approval, for non ROOT related matters and promised to not do it again. Case closed. Cheers, Fons. </pre> Fons Rademakers 2013-04-18T09:51:36 http://comments.gmane.org/gmane.comp.lang.c++.root/15127 <pre>Dear ROOTtalkers, I'm working on a project where I have to create a web-GUI program. In this GUI I'd like to display histograms, pedestals, graphs etc. that are encapsulated in .root files. Basically the program should be able to read .root files (using Python preferably) and display the necessary graphs in a browser. I've seen that there are people who work on the development of JavaScript based solution for this purpose. And it's promising. However, I'd like to know if anyone has some other solutions? Have a nice Thursday! </pre> Pavlo Prykhodko 2013-04-18T08:45:22 http://comments.gmane.org/gmane.comp.lang.c++.root/15123 <pre>hello community. i am facing a reading tntuple problem. the thing is that i need to read a tntuple several time from differents branches and i can not do it in a proper manner. I need to read a tntuple from a text file, so i create a class containing the tntuple DataHelper_Hyp.hh. I check the tntuple by get it (line 4) an print it and showing all the entries. the varlist is "Cos:n1:n2:p1:p2:nn:np" (line 2) Now i am about to read. Basically what i do is to read the 25 th entry fist from the n1 branch and later from the n2 branch. 1gROOT-&gt;ProcessLine(".L helpers/DataHelperH.cc+"); 2DataHelper_Hyp *DhhCos = new DataHelper_Hyp("data/hyperon/C12/C12_CosTheta_0.out","Cos:n1:n2:p1:p2:nn:np"); 3DhhCos-&gt;ReadData(); 4TNtuple *t = DhhCos-&gt;GetTNtuple(); 5t-&gt;Print(); 6const char* Branchx = "Cos"; 7const char* Branchy1 = "n1"; 8const char* Branchy2 = "n2"; 9t-&gt;Show(25); 10Float_t x,y; 11x = new Float_t[1]; 12y = new Float_t[1]; 14t-&gt;SetBranchAddress(Branchx, &amp;x); 15t-&gt;SetBranchAddress(Branchy1, &amp;y); 16t-&gt;</pre> Israel Ariel Gonzalez Medina 2013-04-17T19:19:02 http://comments.gmane.org/gmane.comp.lang.c++.root/15119 <pre>Dear all, Allow me for this one time to use this mailing list to forward an email from my daughter Anouk who, together with a colleague, has taken up an initiative to help traumatized children under the umbrella of the non-profit organisation Dream4kids. In case this initiative appeals to you, please forward this email to friends, colleagues etc. Cheers, Nick. Dear all, We would like to draw your attention to the following: We, Nadine and Anouk, work as volunteers for the Netherlands foundation Dream4kids. This foundation tries to create a positive change in the lives of traumatized children. The purpose of this foundation is to break through the negative spiral in the lives of these children by organizing a ‘dream day’. By realizing one dream, we give these children courage and energy to enjoy life again and to look forward to new opportunities. However, in order to achieve this, we need your help! A dream day obviously has a price tag and via the Dream4kids foundation we have taken up the effor</pre> Nick van Eijndhoven 2013-04-17T11:22:35 http://comments.gmane.org/gmane.comp.lang.c++.root/15118 <pre>Dear Rooters, I have encountered a strange behavior in ubuntu 12.04.2, which might be the result of system upgrades during last month. I work with MPI, each thread creates a TTree in separate file. Then at the end the zero rank thread copies tracks and join them in single file. It was working, but now stops at GetEntry(0). If i do it in my script, without MPI, then it still works. If anyone has a hint, please help. Thanks for great code. Best Regards, Egon ps.the script, which is the same as in the compiled code: { gSystem-&gt;Load("arch/libMCdata.so");//library with LTrack TFile f("data0.root");//input file TFile b("data.root","UPDATE");//outputfile f.cd(); TTree* tree=(TTree*)gDirectory-&gt;Get("tree");//get tree from f LTrack* tfrom; TTree* tnew=new TTree("tree","tree"); LTrack* tto=new LTrack; tnew-&gt;Branch("track",&amp;tto,8000,1); tree-&gt;SetBranchAddress("track",&amp;tfrom); //copy for (Int_t i=0;i&lt;tree-&gt;GetEntries();i++){ tree-&gt;GetEntry(i);//&lt;-here it stops when </pre> Egon Pavlica 2013-04-17T07:15:37 http://comments.gmane.org/gmane.comp.lang.c++.root/15114 <pre>Dear rooters, it may be a trivial problem, but somehow I am unable to draw shapes like TEllipse onto a TH2F histogram. My approach - which seems not to work - looks like this: TFile *f = new TFile("foo.root"); TTree *t = (TTree*)f-&gt;Get("sometree"); t-&gt;Draw("fX:fY"); TEllipse *e = new TEllipse(0.5,0.5,0.2); e-&gt;Draw(); c1-&gt;Update(); Shouldn't this draw a circle at the center of the TCanvas c1 on top of the histogram drawn by the TTree t? Cheers, Jochen </pre> Jochen Kerdels 2013-04-12T09:23:16 http://comments.gmane.org/gmane.comp.lang.c++.root/15103 <pre>Dear ROOTers, I have a memory issue in the macro below executed test.C+, it gobbles up all the memory of the computer bringing it to a standstill. Could anyone kindly suggest a wiser implementation to circumventing this? //------------------------- test.C macro starts here -------------------------------------------- #include &lt;stdio.h&gt; #include &lt;iostream&gt; #include &lt;fstream&gt; #include &lt;stdlib.h&gt; #include &lt;iomanip&gt; #include "TStopwatch.h" #include "TMath.h" #include "TStyle.h" #include "TFile.h" #include "TRandom3.h" #include "TGraph.h" #include "TF1.h" void test() { TRandom3 gRan; //gRan.SetSeed(0); Int_t qq=0, nr=0, SL=-1; const Int_t PX=7, PY=PX+1, DP=1, UW=20000000; Double_t XX[PY],W0[PY],W1[PY],W2[PY],W3[PY],W4[PY],W5[PY]; TGraph u0,u1,u2,u3,u4,u5; Double_t ufm=(Double_t)UW; for (qq=DP;qq&lt;=PX;qq++) { XX[qq-DP]=(Double_t)qq; W0[qq]=gRan.Uniform(); W1[qq]=gRan.Uniform(); W2[qq]=gRan.Uniform(); W3[qq]=gRan.Uniform(); W4[qq]=gRan.Uniform(); W5[qq]=gRan.Uniform(); pri</pre> Dr Ian Korir 2013-04-11T06:30:00 Search the mailing list at Gmane query http://search.gmane.org/?group=$group=gmane.comp.lang.c++.root