fixed a bug in the drivegnuplot scripts. when a new curve is added, they now make sure to add all

the curves leading up to those. So if I'm trying to create curve 5, it'll create 0,1,2,3,4 if they
aren't there

driveGnuPlots.pl

@@ -182,7 +182,7 @@ sub mainThread {
       }
       else
       {
-        newCurve("", $str);
+        newCurve("", $str, undef, $y2idx);
       }
     }
 
@@ -208,11 +208,7 @@ sub mainThread {
           my $idx   = $1;
           my $point = $2;
 
-          # if this curve index doesn't exist, create curve up-to this index
-          while(!exists $curves[$idx])
-          {
-            newCurve("", "");
-          }
+          newCurve("", "", undef, $idx);
 
           push @{$curves[$idx]}, [$xlast, $point];
         }
@@ -304,19 +300,42 @@ sub plotStoredData
 
 sub newCurve()
 {
-  my ($title, $opts, $newpoint) = @_;
+  my ($title, $opts, $newpoint, $idx) = @_;
+
+  # if this curve index doesn't exist, create curve up-to this index
+  if(defined $idx)
+  {
+    while(!exists $curves[$idx])
+    {
+      pushNewEmptyCurve();
+    }
+  }
+  else
+  {
+    # if we're not given an index, create a new one at the end, and fill it in
+    pushNewEmptyCurve();
+    $idx = $#curves;
+  }
+
   if($title) { $opts = "title \"$title\" $opts" }
   else       { $opts = "notitle $opts" }
 
   if( defined $newpoint )
   {
-    push @curves, [" $opts", $newpoint];
+    $curves[$idx] = [" $opts", $newpoint];
   }
   else
   {
+    $curves[$idx] = [" $opts"];
+  }
+}
+
+sub pushNewEmptyCurve
+{
+  my $opts = "notitle ";
   push @curves, [" $opts"];
 }
-}
+
 
 sub usage {
   print "Usage: $0 <options>\n";