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My dataset is organized in this way:

factor <- c("group1", "group2", "group2")
X <- c("A", "B", "C")
V1 <- c(1:3)
V2 <- c(7:9)
V3 <- c(13:15)

df <- data.frame(factor, X, V1, V2, V3)
df
  factor X V1 V2 V3
1 group1 A  1  7 13
2 group2 B  2  8 14
3 group2 C  3  9 15

I would like to represent a line chart where:

  • The X axis represents X (A, B, C)
  • The Y axis represents values from V1, V2, and V3
  • I want to represent in a single chart these three lines, one per each variable (V1, V2, V3).
  • I want to color parts of each line differently according to factor variable, so that a single line (V1 for instance) is partly represented by two colors (let's say red group1 and green group2).
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  • What prevents you to do so? Did you checked plot, lines, ggplot2 already? Commented May 14, 2018 at 15:17

1 Answer 1

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2

You are likely going to want to tidy your data first -- this has to be a duplicate, but couldn't find one quickly...

library(tidyverse)

df %>%
  gather(key, value, -factor, -X) %>%
  ggplot(., aes(x = X, y = value, group = key, color = factor)) +
  geom_line(size = 2)

plot

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