beginning of ShowResult.C for mask cats test

NPTutorials/cats/ShowResult.C

+TChain* chain=NULL;
+TCanvas* c1=NULL;
+
+void ShowResult()
+{
+    LoadChain();
+ 
+    c1 = new TCanvas("Mask CATS E644 experiment","Mask CATS E644 experiment",600,600);
+    c1->cd();
+    // Y versus X for CATS1 detector
+    chain->Draw("PositionY[0]:PositionX[0]>>h(600,-30,30,600,-30,30)","","colz");
+    
+    return 0;
+}
+
+
+////////////////////////////////////////////////////////////////////////////////
+void LoadChain(){
+    chain = new TChain("AnalysedTree");
+    chain->Add("../../Outputs/Analysis/Analysed_test_cats_mask_e644.root");
+}
\ No newline at end of file