ggplot and R: Two variables over time

Question

I\'d like to know how to make it so that x and y, in the following example data set are plotted on the vertical axis for each element of frame in the horizontal axis. How do

Answer 1

This is a rather late answer, but if you want your frame variable intepreted date (month of the year), then convert it to a date.

You can then use scale_x_date and the scales package to format the x-axis

DF <- melt(df, id.vars = 'frame')
# note that I am arbitrarily setting each month to be the 15th 
# day of the month, to create a complete date 
DF$date <- as.Date(paste0(as.character(df$frame), '15'), '%Y%M%d')
library(scales)
ggplot(DF, aes(x =frame, y = value, colour = variable))  +  
 geom_line() + 
 scale_x_date('Month', labels = date_format('%b %Y'), breaks = date_breaks('2 months'))