Suppress warning in vignette

wch · wch · commit 9bcdf602b560 · 2014-10-03T11:07:50.000-05:00
diff --git a/vignettes/cookbook.Rmd b/vignettes/cookbook.Rmd
@@ -185,7 +185,7 @@ cocaine %>% ggvis(~month, fill := "#fff8dc") %>%
 ```
 ## Box plots
 
-```{r}
+```{r message=FALSE, warning=FALSE}
 mtcars %>% ggvis(~factor(cyl), ~mpg) %>% layer_boxplots()
 ```
 
