{
	TTree *myTree = new TTree();
	// adjust name of the file to read and list of variables as appropriate
	// each variable should correspond to a column in the file, and the
	// syntax is "v1:v2:v3" where v1, v2, v3 are the names of the variables
	myTree->ReadFile("random_numbers.dat","r");

	// now plot whatever variables you choose. Use the syntax "y:x" for 2D plots
	myTree->Draw("r");

	// you can also change the titles of the axes
	htemp->GetXaxis()->SetTitle("random number");
	htemp->GetYaxis()->SetTitle("#entries");
}