Is there a way to code the hovermode when using plotly with R and ggplot2? 

Currently, my code is:

```
plot <- ggplot(data, aes(var1, var2, text=var3)) + 
  geom_point()
py$ggplotly(plot)

```

And I want the plotly graph to automatically have the hover mode set to "show closest data on hover" rather than "compare data on hover".