3 files changed, 10 insertions, 10 deletions
diff --git a/src/algebra/draw.spad.pamphlet b/src/algebra/draw.spad.pamphlet
index de5dc3e3..52f12b71 100644
--- a/src/algebra/draw.spad.pamphlet
+++ b/src/algebra/draw.spad.pamphlet
@@ -318,9 +318,9 @@ TopLevelDrawFunctionsForCompiledFunctions():
     myTrap1: (SF-> SF, SF) -> SF
     myTrap1(ff:SF-> SF, f:SF):SF ==
       s := trapNumericErrors(ff(f))$Lisp :: Union(SF, "failed")
-      s case "failed" => _$NaNvalue$Lisp
+      s case "failed" => quietDoubleNaN()$Lisp
       r:=s::SF
-      r >max()$SF or r < min()$SF => _$NaNvalue$Lisp
+      r >max()$SF or r < min()$SF => quietDoubleNaN()$Lisp
       r
 
     makePt2: (SF,SF) -> Point SF
@@ -493,9 +493,9 @@ TopLevelDrawFunctionsForCompiledFunctions():
     myTrap2: ((SF, SF) -> SF, SF, SF) -> SF
     myTrap2(ff:(SF, SF) -> SF, u:SF, v:SF):SF ==
       s := trapNumericErrors(ff(u, v))$Lisp :: Union(SF, "failed")
-      s case "failed" =>  _$NaNvalue$Lisp
+      s case "failed" =>  quietDoubleNaN()$Lisp
       r:SF := s::SF
-      r >max()$SF or r < min()$SF => _$NaNvalue$Lisp
+      r >max()$SF or r < min()$SF => quietDoubleNaN()$Lisp
       r
 
     recolor(ptFunc,colFunc) ==
diff --git a/src/algebra/plot.spad.pamphlet b/src/algebra/plot.spad.pamphlet
index 5b5eefd3..0ab68ee1 100644
--- a/src/algebra/plot.spad.pamphlet
+++ b/src/algebra/plot.spad.pamphlet
@@ -284,7 +284,7 @@ Plot(): Exports == Implementation where
       xDiff = 0 or yDiff = 0 => curve
       l := lo tRange; h := hi tRange
       (tDiff := h-l) = 0 => curve
---      if (EQL(yDiff, _$NaNvalue$Lisp)$Lisp) then yDiff := 1::F
+--      if (EQL(yDiff, quietDoubleNaN()$Lisp)$Lisp) then yDiff := 1::F
       t := curve.knots
       #t < 3 => curve
       p := curve.points; f := curve.source
@@ -477,9 +477,9 @@ Plot(): Exports == Implementation where
     myTrap: (F-> F, F) -> F
     myTrap(ff:F-> F, f:F):F ==
       s := trapNumericErrors(ff(f))$Lisp :: Union(F, "failed")
-      s case "failed" => _$NaNvalue$Lisp
+      s case "failed" => quietDoubleNaN()$Lisp
       r:F:=s::F
-      r > max()$F or r < min()$F => _$NaNvalue$Lisp
+      r > max()$F or r < min()$F => quietDoubleNaN()$Lisp
       r
 
     plot(f:F -> F,xRange:R) ==
diff --git a/src/algebra/plot3d.spad.pamphlet b/src/algebra/plot3d.spad.pamphlet
index faf926ad..658b3a32 100644
--- a/src/algebra/plot3d.spad.pamphlet
+++ b/src/algebra/plot3d.spad.pamphlet
@@ -192,11 +192,11 @@ Plot3D(): Exports == Implementation where
  
     select(l,f,g) ==
       m := f first l
-      if (EQL(m, _$NaNvalue$Lisp)$Lisp) then m := 0
+      if (EQL(m, quietDoubleNaN()$Lisp)$Lisp) then m := 0
 --      for p in rest l repeat m := g(m,fp)
       for p in rest l repeat
         fp : F := f p
-        if (EQL(fp, _$NaNvalue$Lisp)$Lisp) then fp := 0
+        if (EQL(fp, quietDoubleNaN()$Lisp)$Lisp) then fp := 0
         m := g(m,fp)
       m
  
@@ -447,7 +447,7 @@ Plot3D(): Exports == Implementation where
     myTrap(ff:F-> F, f:F):F ==
       s := trapNumericErrors(ff(f))$Lisp :: Union(F, "failed")
       if (s) case "failed" then
-        r:F := _$NaNvalue$Lisp
+        r:F := quietDoubleNaN()$Lisp
       else
         r:F := s
       r