geom_line becomes invisible when color aesthetic applied

[wolfeclw]

I am attempting to apply a gradient color scale to a line in a ggplot object. When I create the plotly chart, the plotted line is not visible. Hovering over the plot area shows the values of the variables if the cursor is where the line is located, even though the line is not visible.

If I do not apply a color aesthetic, the line is visible.

I have download the most recent plotly package from Github.

Here is some example code of the issue:

library(tidyverse)

df <- tibble(
x = rnorm(100, 7, 1),
y = rnorm(100, 4, 1),
z = rnorm(100, 5, 1))

plot <- ggplot(df) +
geom_line(aes(x, y, color = z),
lwd = 1.5) +
scale_color_gradient(low = "red",
high = "blue")

plot

plotly::plotly_build(plot)

[alexcjohnson]

@cpsievert would you prefer this over at https://github.com/ropensci/plotly ?
Presumably this is #581 - note our (as yet unimplemented) plan to allow line color/width arrays only in scattergl

[cpsievert]

Ohhh, yea, if you can transfer that'd be great -- super stoked to see this in scattergl!

[wolfeclw]

Yes, I had meant to post this over there. Thanks for the tip!