Skip to content

Need position_stack_line() #2883

Closed
Closed
@mikmart

Description

@mikmart

geom_area() doesn't play well with duplicated x values. The docs state:

geom_area is a special case of geom_ribbon, where the ymin is fixed to 0.

But when there are multiple values of y for a given value of x, the two are not equivalent. The geom_ribbon() result matches the intuition of "geom_line() but with the area under the curve filled in":

library(tidyverse)
df <- data.frame(x = c(1, 2, 2, 3), y = 1:4)

ggplot(df, aes(x, y)) + geom_ribbon(aes(ymin = 0, ymax = y))

However, it seems this scenario results in geom_area() having the equivalent of ymin = min(y) and ymax = sum(y) in geom_ribbon().

ggplot(df, aes(x, y)) + geom_area()

I'm happy to dig a bit further and see if I can submit a PR for this.

Created on 2018-09-06 by the reprex package (v0.2.0.9000).

Metadata

Metadata

Assignees

No one assigned

    Labels

    Type

    No type

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions