I'm currently a beginner in Plotly and have a problem I can't seem to solve. I have my plotly stacked bar chart but I don't know how to color each individual category. I am currently using R.
This is my current stacked bar chart:
My current code is:
p = plot_ly(x, x = day, y = count, type = "bar", group = status) %>% layout(barmode = "stack", showlegend = T)
I've tried using the "color = " parameter and also markers, but nothing correctly colors my graph.
Answer
You need to specify a factor for the color parameters, and then a vector of colours for the colors parameter.
Here is a simple solution. Note the ordering required on the data frame before plotting.
require(dplyr)
require(plotly)
set.seed(42)
df <- data.frame(x = rep(LETTERS[1:5], 3),
y = rexp(15, rate = 0.5),
z = c(rep("Adam", 5), rep("Arthur", 5), rep("Ford", 5)))
df <- arrange(df, desc(z))
plot_ly(df,
x = x,
y = y,
color = z,
colors = c("grey50", "blue", "red"),
type = "bar") %>%
layout(barmode = "stack")
The ordering on the data frame matters strangely. I would have thought plot_ly would use the order of the levels but it doesn't.
EDIT:
This example uses plotly 3.x.x. If you use plotly 4.x.x or above, this code may not work as is. See here for more details: https://www.r-bloggers.com/upgrading-to-plotly-4-0-and-above/