ggplot line graph with NA values

Question

I\'m having with trouble with ggplot trying to plot 2 incomplete time series on the same graph where the y data does not have the same values on the x-axis (year) - NAs are

Answer 1

You can remove them by subsetting your dataframe:

  ggplot(test, aes(x=YEAR)) + 
  geom_line(data=subset(test, !is.na(A1)),aes(y = A1), size=0.43, colour="red") +  
  geom_line(data=subset(test, !is.na(A2)),aes(y = A2), size=0.43, colour="green") +
  xlab("Year") + ylab("Percent") +
  scale_x_continuous(limits=c(1935, 1995), breaks = seq(1935, 1995, 5),
                     expand = c(0, 0)) + 
  scale_y_continuous(limits=c(0,50), breaks=seq(0, 50, 10), expand = c(0, 0))