If you are interested in a specific group, you can highlight it as follow:
# Libraries
library(GGally)
library(dplyr)
library(hrbrthemes)
# Data set is provided by R natively
data <- iris
# Plot
data %>%
arrange(desc(Species)) %>%
ggparcoord(
columns = 1:4, groupColumn = 5, order = "anyClass",
showPoints = TRUE,
title = "Highlight a group",
alphaLines = 1
) +
scale_color_manual(values=c( "#69b3a2", "#E8E8E8", "#E8E8E8") ) +
theme_ipsum()+
theme(
legend.position="Default",
plot.title = element_text(size=10)
) +
xlab("")