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 with na.omit:

library(ggplot2)
#use na.omit below
ggplot(na.omit(test), aes(x=YEAR)) + 
  geom_line(aes(y = A1), size=0.43, colour="red") +  
  geom_line(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))

EDIT

Using 2 separate data.frames with na.omit:

#test1 and test2 need to have the same column names
test1 <- test[1:2]
test2 <- tes[c(1,3)]
colnames(test2) <- c('YEAR','A1')

library(ggplot2)
ggplot(NULL, aes(y = A1, x = YEAR)) + 
  geom_line(data = na.omit(test1), size=0.43, colour="red") +  
  geom_line(data = na.omit(test2), 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))