Ex8 and minor improvements

sheet3/8/nl.awk

@@ -0,0 +1,20 @@
+#
+#	Have to add a newline for a new row of coordinates
+#
+BEGIN { OFS="	"; YO=-1.23456789; X=YO; Y=YO; Z=YO }
+      { 
+        if ($1!="")
+	{
+	  if ($1!=YO) { print " "; YO=$1 }
+          if ($1==X && $2==Y)
+	   {
+#	     print $1,$2,($3+Z)/2
+	   }
+	   else
+	   {
+	     print $1,$2,$3
+	   }
+	  X=$1; Y=$2; Z=$3;
+	}
+      }
+END {}