--- graf/inc/TGraph.h-orig	2005-05-11 21:59:32.000000000 +0200
+++ graf/inc/TGraph.h	2005-05-11 22:03:18.000000000 +0200
@@ -95,6 +95,7 @@
         virtual void     DrawGraph(Int_t n, const Float_t *x, const Float_t *y, Option_t *option="");
         virtual void     DrawGraph(Int_t n, const Double_t *x=0, const Double_t *y=0, Option_t *option="");
         virtual void     DrawPanel(); // *MENU*
+        static void      EnlargeRange(Bool_t log, const Double_t min, const Double_t max, Double_t&min_out, Double_t&max_out);
         virtual Double_t Eval(Double_t x, TSpline *spline=0, Option_t *option="") const;
         virtual void     ExecuteEvent(Int_t event, Int_t px, Int_t py);
         virtual void     Expand(Int_t newsize);
--- graf/src/TGraph.cxx-orig	2005-05-11 21:51:05.000000000 +0200
+++ graf/src/TGraph.cxx	2005-05-11 22:22:14.000000000 +0200
@@ -639,6 +639,22 @@
 }
 
 //______________________________________________________________________________
+void TGraph::EnlargeRange(Bool_t log, const Double_t min, const Double_t max,
+                          Double_t&out_min, Double_t&out_max)
+{
+// enlarge the range by 10% on either side, taking into account log scale
+  if (log) {
+    Double_t d = TMath::Power(10, 0.1*TMath::Log10(max/min));
+    out_min = min / d;
+    out_max = max * d;
+  } else {
+    Double_t d = 0.1*(max - min);
+    out_min = min - d;
+    out_max = max + d;
+  }
+}
+
+//______________________________________________________________________________
 Double_t TGraph::Eval(Double_t x, TSpline *spline, Option_t *option) const
 {
 // Interpolate points in this graph at x using a TSpline
@@ -1448,7 +1464,7 @@
 //       2- user had called TPad::DrawFrame. return pointer to hframe histogram
 
   if (fHistogram) return fHistogram;
-  Double_t rwxmin,rwxmax, rwymin, rwymax, maximum, minimum, dx, dy;
+  Double_t rwxmin,rwxmax, rwymin, rwymax, maximum, minimum;
   Double_t uxmin, uxmax;
   if (fNpoints <= 0) {
      rwxmin = rwxmax = 0;
@@ -1468,12 +1484,8 @@
 
   if (rwxmin == rwxmax) rwxmax += 1.;
   if (rwymin == rwymax) rwymax += 1.;
-  dx = 0.1*(rwxmax-rwxmin);
-  dy = 0.1*(rwymax-rwymin);
-  uxmin    = rwxmin - dx;
-  uxmax    = rwxmax + dx;
-  minimum  = rwymin - dy;
-  maximum  = rwymax + dy;
+  EnlargeRange(gPad && gPad->GetLogx(), rwxmin, rwxmax, uxmin, uxmax);
+  EnlargeRange(gPad && gPad->GetLogy(), rwymin, rwymax, minimum, maximum);
   if (fMinimum != -1111) minimum = fMinimum;
   if (fMaximum != -1111) maximum = fMaximum;
 
@@ -1997,7 +2009,7 @@
 
 //*-*-           Draw the Axis with a fixed number of division: 510
 
-  Double_t rwxmin,rwxmax, rwymin, rwymax, maximum, minimum, dx, dy;
+  Double_t rwxmin,rwxmax, rwymin, rwymax, maximum, minimum;
 
   if (OptionAxis) {
 
@@ -2032,12 +2044,8 @@
 
         if (rwxmin == rwxmax) rwxmax += 1.;
         if (rwymin == rwymax) rwymax += 1.;
-        dx = 0.1*(rwxmax-rwxmin);
-        dy = 0.1*(rwymax-rwymin);
-        uxmin    = rwxmin - dx;
-        uxmax    = rwxmax + dx;
-        minimum  = rwymin - dy;
-        maximum  = rwymax + dy;
+        EnlargeRange(gPad->GetLogx(), rwxmin, rwxmax, uxmin, uxmax);
+        EnlargeRange(gPad->GetLogy(), rwymin, rwymax, minimum, maximum);
      }
      if (fMinimum != -1111) rwymin = minimum = fMinimum;
      if (fMaximum != -1111) rwymax = maximum = fMaximum;