combine data from 2 data frames in one plot using different graphs

Question

I would like to combine a line plot and a scatter plot in one graph. The data comes from different data frames and the columns have different names. This is my reproducible example, which throws an error:

library(ggplot2)

x <- runif(1000, min = 0, max = 100)
y <- rnorm(1000, mean = 50, sd = 30)
df1 <- data.frame(
      x = x
      , y = y
)

x1 <- runif(10, min = 0, max = 100)
y1 <- rnorm(10, mean = 50, sd = 30)
df2 <- data.frame(
      x1 = x1
      , y1= y1
)

ggplot(df1, aes(x, y)) +
    geom_line() +
    geom_point(df2, aes(x1, y1))

Use geom_point(aes(x1, y1), df2). Layers (eg., geom_point) have different argument ordering than main ggplot call (ie, in layers aes goes first). — pogibas
– pogibas, Commented Feb 16, 2019 at 15:24
Isn't this a typo or why is this code not working? imo, you're passing wrong arguments. — pogibas
– pogibas, Commented Feb 16, 2019 at 15:40
2 up votes and one close vote. whoever voted for close have some guts and elicit your reasons! — cs0815
– cs0815, Commented Feb 16, 2019 at 15:48
Possible duplicate of Overplotting from different data frames in ggplot2 — camille
– camille, Commented Feb 16, 2019 at 22:07

Ulises Rosas-Puchuri · Accepted Answer · 2019-02-16 15:35:45Z

2

Try to upload data on each geom_* separately:

ggplot() +
  geom_line(data = df1, aes(x, y), color = "grey") +
  geom_point(data = df2, aes(x1, y1), color = "red")

answered Feb 16, 2019 at 15:35

Ulises Rosas-Puchuri

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