How to plot line graph with a certain break of year variable in ggplot2

Question

I want to plot a line graph with continuous years on x axis from 1990 to 2005.

# I create a dataframe as below and try to plot as a line graph. 

year<-c(1990:2005)

num<-c(3,2,4,7,6,22,9,31,12,30,17,23,21,36,41,21)

df<-data.frame(year,num)

str(df)

library(ggplot2)

ggplot(data=df,aes(x=year,y=num)) + geom_line() + theme_bw() + ylab("Number") +  xlab("Year") + geom_point()

This above plot does not give x axis from 1990, 1991, 1992,...,2005 as I want it to be. (not 1990, 1995, 2000,2005).

davidski · Accepted Answer · 2017-08-03 23:30:13Z

1

check out scale_x_continuous() - there is an option breaks inside which you can set to whatever you like. something like breaks = seq(1990,2005,1) should do.

answered Aug 3, 2017 at 23:30

davidski

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2 Comments

Tuyen Over a year ago

Thanks so much @davidski

davidski Over a year ago

glad it helped. for general axis/labels related questions you can refer to the scale_*_*() functions in the docs. here is also a cheat sheet for quick reference. also, pls consider marking this as solved - if my answer did indeed solve your question.

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