Is there any command to set your own pallet?
In a plot like this:
library(ggalluvial)
library(ggplot2)
library(dplyr)
df <- data.frame(status = c("open", "close", "close", "open/close", "close"),
stock = c("google", "amazon", "amazon", "yahoo", "amazon"),
newspaper = c("times", "newyork", "london", "times", "times"))
# Count the number of occurance for each alluvial
df <- df %>% dplyr::group_by(stock, newspaper, status) %>%
summarise(n = n())
# Define the factors
df$status <- factor(df$status, levels = c("open", "open/close", "close"))
df$stock <- factor(df$stock, levels = c("google", "amazon", "yahoo"))
df$newspaper <- factor(df$newspaper, levels = c("times", "newyork", "london"))
# Plot the alluvial as in https://cran.r-project.org/web/packages/ggalluvial/vignettes/ggalluvial.html#alluvia-wide-format
ggplot2::ggplot(df.2, aes(y = n, axis1 = stock, axis2 = newspaper)) +
ggalluvial::geom_alluvium(aes(fill = status), width = 1/12) +
ggalluvial::geom_stratum(width = 1/12, fill = "black", color = "grey") +
ggplot2::geom_label(stat = "stratum", aes(label = after_stat(stratum))) +
ggplot2::scale_x_discrete(limits = c("stock", "newspaper"), expand = c(.05, .05)) +
ggplot2::scale_fill_brewer(type = "qual", palette = "Set1")
How is it possible to set our own colours?
>Solution :
You already are setting your own palette (you have chosen the "Set1" palette from the RColorBrewer package via scale_fill_brewer). If you want to set the colors manually, use scale_fill_manual
ggplot(df, aes(y = n, axis1 = stock, axis2 = newspaper)) +
geom_alluvium(aes(fill = status), width = 1/12) +
geom_stratum(width = 1/12, fill = "gray30", color = "white", size = 2) +
geom_text(stat = "stratum", aes(label = after_stat(stratum), angle = 90),
color = "white", size = 6) +
scale_x_discrete(limits = c("stock", "newspaper"), expand = c(.05, .05)) +
scale_fill_manual(values = c(open = 'red4',
`open/close` = 'orange3',
close ='navy')) +
ggtitle("Alluvial-Test") +
theme_void(base_size = 16) +
theme(plot.margin = margin(20, 20, 20, 20))
