Basic script and histogram creation examples

add42.C

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+int add42(int value) {
+  return value+42;
+}
+int add53(int value) {
+  return value+53;
+}

make_2D.C

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+#include "TH2F.h"
+#include "TRandom.h"
+
+TH2* h2D;
+
+void make_2D()
+{
+  h2D = new TH2F("h2D","2D Gaussian peak",160,-4.,4.,160,-4.,4.);
+  for( int i=0; i<100000; ++i ) {
+    double x = gRandom->Gaus(0,1);
+    double y = gRandom->Gaus(1,2);
+    h2D->Fill(x,y);
+  }
+}

make_histos.C

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+#include "TH1I.h"
+#include "TRandom.h"
+
+TH1 *h1, *h2;
+
+void make_histos() {
+  h1 = new TH1I("h1","Gaussian distribution",160,-4.,4.);
+  h2 = new TH1I("h2","Shifted narrower Gaussian",160,-4.,4.);
+  for ( int i=0; i<10000; ++i ) {
+    double x;
+    x = gRandom->Gaus(0,1);
+    h1->Fill(x);
+    x = gRandom->Gaus(0.2,0.8);
+    h2->Fill(x);
+  }
+}

make_prof.C

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+#include "TProfile.h"
+#include "TRandom.h"
+
+TProfile* hp;
+
+void make_prof()
+{
+  hp = new TProfile("hp","Profile of shifted Gaussian",160,-4.,4.);
+  for( int i=0; i<100000; ++i ) {
+    double x = gRandom->Gaus(0,1);
+    double y = gRandom->Gaus(1,2);
+    hp->Fill(x,y);
+  }
+}