Besides changing the appearance of axes and legends, we can rescale the mapping of the data and how it should be displayed on the plot with the scale function. In this recipe, we introduce how to scale data in ggvis.
Ensure you have installed and loaded ggvis into your R session. Also, you need to complete the previous steps by storing house in your R environment.
Please perform the following steps to rescale data in ggvis:
First, create a bar plot and then replace the linear scale with a power scale:
> house %>% ggvis(~Status, ~Price, fill=~Status) %>% layer_bars() %>% scale_numeric("y", trans = "pow", exponent = 0.2)
Figure 26. Adjusting the scale of the bar plot
We can change the fill color with the
scale_nominalfunction:> house %>% ggvis(~Status, ~Price, fill=~Status) %>% layer_bars() %>% scale_nominal("fill", range = c("pink", "green", "lightblue"))
Figure 27. Changing the fill color of the bar plot
