diff --git a/src/library/datasets/data/cars.R b/src/library/datasets/data/cars.R
index 32501e29f85..b5ba3a8ec4a 100644
--- a/src/library/datasets/data/cars.R
+++ b/src/library/datasets/data/cars.R
@@ -4,4 +4,18 @@ speed = c(4, 4, 7, 7, 8, 9, 10, 10, 10, 11, 11, 12, 12, 12, 12, 13,
   18, 18, 19, 19, 19, 20, 20, 20, 20, 20, 22, 23, 24, 24, 24, 24, 25),
 dist =  c(2, 10, 4, 22, 16, 10, 18, 26, 34, 17, 28, 14, 20, 24, 28, 26,
   34, 34, 46, 26, 36, 60, 80, 20, 26, 54, 32, 40, 32, 40, 50, 42, 56,
-  76, 84, 36, 46, 68, 32, 48, 52, 56, 64, 66, 54, 70, 92, 93, 120, 85))
+  76, 84, 36, 46, 68, 32, 48, 52, 56, 64, 66, 54, 70, 92, 93, 120, 85)
+ speed_ms = c( 1.78816, 1.78816, 3.12928, 3.12928, 3.57632, 4.02336, 
+  4.4704, 4.4704, 4.4704, 4.91744, 4.91744, 5.36448, 5.36448, 5.36448, 
+  5.36448, 5.81152, 5.81152, 5.81152, 5.81152, 6.25856, 6.25856, 6.25856, 
+  6.25856, 6.7056, 6.7056, 6.7056, 7.15264, 7.15264, 7.59968, 7.59968, 
+  7.59968, 8.04672, 8.04672, 8.04672, 8.04672, 8.49376, 8.49376, 8.49376, 
+  8.9408, 8.9408, 8.9408, 8.9408, 8.9408, 9.83488, 10.28192, 10.72896, 
+  10.72896, 10.72896, 10.72896, 11.176 ),
+  dist_m   = c( 0.6096, 3.048, 1.2192, 6.7056, 4.8768, 3.048, 5.4864, 7.9248, 
+  10.3632, 5.1816, 8.5344, 4.2672, 6.096, 7.3152, 8.5344, 7.9248, 10.3632, 
+  10.3632, 14.0208, 7.9248, 10.9728, 18.288, 24.384, 6.096, 7.9248, 16.4592, 
+  9.7536, 12.192, 9.7536, 12.192, 15.24, 12.8016, 17.0688, 23.1648, 25.6032, 
+  10.9728, 14.0208, 20.7264, 9.7536, 14.6304, 15.8496, 17.0688, 19.5072, 
+  20.1168, 16.4592, 21.336, 28.0416, 28.3464, 36.576, 25.908 )
+)