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R - Ggplot function unable to run over multiple lines

For some reason ggplot has a hard time running when the code is split into multiple lines. For example this line of code will run (but is long and difficult to work with):

ggplot(mapping = aes(x = weight, y = horsepower)) + geom_point(size = 3) + labs(x = "Vehicle weight (lbs.)", y = "Engine Horsepower") + ggtitle("Weight vs. Horsepower")


However, these lines of code, which fit into the tidyverse style guide, will not run:

ggplot(mapping = aes(x = weight, y = horsepower)) + geom_point(size = 3)
+ labs(x = "Vehicle weight (lbs.)", y = "Engine Horsepower")
+ ggtitle("Weight vs. Horsepower")


I'm not sure what I'm doing wrong, and my searches haven't turned up anything.

The error I am getting is:

Invalid argument to unary operator calls


+

+

2 Answers
2

Try putting the + operator at the end of each previous line.

+

You need to have the + sign at the end of each line.
Like

ggplot(data,aes(x,y)) +

geom_line()


Not

ggplot(data,aes(x,y))

+ geom_line()


Similarly, you would also need the similar approach when using dplyr pipe (%>%)

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