Search code examples
rggvis

Adding dashed line with layer_lines in ggvis

this is quite simple but I was not able to find a solution. How can I make a line in layers_lines dashed in ggvis. I'm dealing with a custom type of linear regression and I provide this toy example for my problem:

library(ggvis)
W=seq(0,10,0.1)
data=data.frame(fit=3+2*W,upper=4+2*W,lower=2+2*W)
base <- data %>% ggvis(x= ~fit,y= ~W)%>%layer_lines() %>%
layer_lines(x= ~lower,y= ~W)%>%layer_lines(x= ~upper,y= ~W)

This produces this image: enter image description here

I want the upper and the lower lines to be dashed. Thank you so much for the help!

Solution

  • It definitely helps to brush up on Vega to use ggvis. You need to use the strokeDash property.

    library(ggvis)

W <- seq(0, 10, 0.1)

data <- data.frame(fit=3+2*W, upper=4+2*W, lower=2+2*W)

data %>% 
  ggvis(x= ~fit, y= ~W) %>% 
  layer_lines() %>%
  layer_lines(x= ~lower, y= ~W, strokeDash:=6) %>% 
  layer_lines(x= ~upper, y= ~W, strokeDash:=6) -> base

base

    enter image description here