void evolution()
{

Float_t omega, r, n=6, erro, omegaISO, erroISO;
Int_t a, cont=0;
Float_t x[6] = {2.0, 4.0, 6.0, 8.0, 10.0, 12.0};
Float_t ex[6] = {0, 0, 0, 0, 0, 0};
Float_t xISO[6] = {2.0, 4.0, 6.0, 8.0, 10.0, 12.0};
Float_t exISO[6] = {0, 0, 0, 0, 0, 0};
Float_t y[6] = {0.990574, 0.345425, 0.225380, 0.187156, 0.162945, 0.149660};
Float_t ey[6] = {1.746735, 0.896797, 0.645663, 0.535057, 0.473232, 0.437163};
Float_t yISO[6] = {1.740580, 0.619498, 0.356679, 0.263114, 0.220569, 0.199252};
Float_t eyISO[6] = {2.397627, 1.250775, 0.856332, 0.676037, 0.581200, 0.525240};


TGraphErrors* gr = new TGraphErrors(n,x,y, ex, ey);
//gr->SetTitle("");
gr->SetMarkerSize(0.75);
gr->SetFillColor(42);
//gr->Draw("AP");
gr->SetMarkerStyle(21);
gr->SetMarkerColor(2);

TGraphErrors* gr2 = new TGraphErrors(n,xISO,yISO, exISO, eyISO);
gr2->GetYaxis()->SetTitleOffset(0.9);
gr2->SetTitle("");
gr2->SetMarkerSize(0.75);
gr2->GetXaxis()->SetTitle("#alpha (degree)");
gr2->GetYaxis()->SetTitle("#Omega");
gr2->SetFillColor(42);
//gr2->Draw("a3");
//gr2->SetLineWidth(1);
gr2->SetMarkerStyle(21);
gr2->SetMarkerColor(2);


TMultiGraph *mg = new TMultiGraph();
mg->SetTitle("");
mg->Add(gr,"AP");
mg->Add(gr2,"a3");
mg->Draw();



}//fecha o programa