NoFix | Firefox extension countering the Session Fixation

geom_line() does not connect across any missing data (NA). And geom_point() does not plot missing data either. That is the correct default behaviour for missing data. NA cannot be placed on numerical axes.

What you are doing with df[!is.na(df$tr2),] is removing the missing data before sending it to geom_line(), tricking into thinking that your data is complete. To better understand this, print out df[!is.na(df$tr2), c("x", "tr2")]. That's the data that geom_line() receives. All of this data is displayed and connected. There are no NAs in that data, because you removed them.

In your "nofix example, you get a line from x=1 to x=5, over three consecutive NA. So I assume that you mean that geom_line() does not continue after x=7? But look at the data. There is no data after x=7. Every x>7 has y=NA. And if you remove NAs, then there is no data at all after x=7.

If your example had one more point, say x=10 y=10, then the line would continue from x=7 to x=10.