Drawing histograms in TObjArray of canvases

[couet]

void recon_macro()
{
   // Opening and referencing recon tree

   TFile *treefile = TFile::Open("recon_tree.root");

   TH1F *h[401][20];
   for (int a = 0; a <= 400; a++) {
      for (int f = 0; f <= 19; f++)  h[a][f] = (TH1F*)treefile->Get(TString::Format("h%d_at_c%d", f, a));
   }
   h[30][19]->Draw();
}

[Fr4nk]

@couet Thank you so much that works perfectly!