doc/v634/scatter_8C.html

void scatter()

{

   auto canvas = new TCanvas();

   canvas->SetRightMargin(0.14);

   gStyle->SetPalette(kBird, 0, 0.6); // define a transparent palette


   const int n = 175;

   double x[n];

   double y[n];

   double c[n];

   double s[n];


   // Define four random data set

   auto r  = new TRandom();

   for (int i=0; i<n; i++) {

      x[i] = 100*r->Rndm(i);

      y[i] = 200*r->Rndm(i);

      c[i] = 300*r->Rndm(i);

      s[i] = 400*r->Rndm(i);

   }


   auto scatter = new TScatter(n, x, y, c, s);

   scatter->SetMarkerStyle(20);

   scatter->SetTitle("Scatter plot title;X title;Y title;Z title");

   scatter->GetXaxis()->SetRangeUser(20.,90.);

   scatter->GetYaxis()->SetRangeUser(55.,90.);

   scatter->GetZaxis()->SetRangeUser(10.,200.);

   scatter->Draw("A");

}

c
#define c(i)
Definition RSha256.hxx:101

TRangeDynCast
ROOT::Detail::TRangeCast< T, true > TRangeDynCast
TRangeDynCast is an adapter class that allows the typed iteration through a TCollection.
Definition TCollection.h:358

kBird
@ kBird
Definition TColor.h:118

r
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void char Point_t Rectangle_t WindowAttributes_t Float_t r
Definition TGWin32VirtualXProxy.cxx:168

gStyle
R__EXTERN TStyle * gStyle
Definition TStyle.h:436

ROOT::Detail::TRangeCast
Definition TCollection.h:311

TCanvas
The Canvas class.
Definition TCanvas.h:23

TRandom
This is the base class for the ROOT Random number generators.
Definition TRandom.h:27

TScatter
A TScatter is able to draw four variables scatter plot on a single plot.
Definition TScatter.h:32

TStyle::SetPalette
void SetPalette(Int_t ncolors=kBird, Int_t *colors=nullptr, Float_t alpha=1.)
See TColor::SetPalette.
Definition TStyle.cxx:1888

y
Double_t y[n]
Definition legend1.C:17

x
Double_t x[n]
Definition legend1.C:17

n
const Int_t n
Definition legend1.C:16