fixed wrong Fourier vector size for DKS.

src/tests/DKS_FourierTest/dks_fourierTest.cpp

@@ -78,7 +78,7 @@ int main(int argc, char *argv[])
     snprintf(str, sizeof(str), "h%d", i);
     h = new TH1F(str, str, L+1, -dt/2, 10.0+dt/2);
     for (unsigned int j=0; j<(unsigned int)h->GetNbinsX(); j++) {
-      dval = exp(-0.5*dt*j)*cos(0.013554*5000.0*dt*j+6.2832/N*i);
+      dval = exp(-0.25*pow(dt*j,2.0))*cos(0.013554*5000.0*dt*j+6.2832/N*i);
       h->SetBinContent(j+1, dval);
     }
     data.push_back(h);
@@ -125,6 +125,7 @@ int main(int argc, char *argv[])
   }
   TFile fout("dks_fourierTest.root", "recreate");
   for (unsigned int i=0; i<fourierPowerHistos.size(); i++) {
+    data[i]->Write();
     fourierPowerHistos[i]->Write();
   }
   fout.Close();