ggplot2 date objects rounded on horizontal axis

1
votes

When I plot time series objects in ggplot2 where the horizontal axis are date objects (month-end dates), I find that the dates somehow get "rounded-up" to the beginning of the next month. For example, "January 31, 2014" would appear as "February 1, 2014". An example is provided below. How can I fix this? Thanks!

fruits.sold <- data.frame(Date=c("1/31/2014", "1/31/2014", "2/28/2014", "2/28/2014", "3/31/2014", "3/31/2014"), 
                   Fruit=c("Apple", "Banana", "Apple", "Banana", "Apple", "Banana"), 
                   Sold=c(200, 300, 250, 350, 300, 400))

fruits.sold$Date <- as.Date(fruits.sold$Date, "%m/%d/%Y")

qplot(Date, Sold, colour=Fruit, data=fruits.sold)
1
rggplot2

1 Answers

2
votes

You can specify this directly with scale_x_date: 

p <- qplot(Date, Sold, colour=Fruit, data=fruits.sold)
p + scale_x_date(breaks=fruits.sold$Date,
            labels=format(fruits.sold$Date,
                      format="%B %d %Y"))

enter image description here