[R] Plotting a loess line when the abcissa variable has numerous NA's

[David Winsemius]

On Feb 8, 2014, at 12:28 PM, David Parkhurst wrote:

> I have a situation in which I want to plot a variable Y against X, and then to add a loess line to that plot.  My X variable is 366 elements long, and about 1/3 are NA's, scattered through the list.  None of the corresponding Y's are NA's.  Everything I’ve tried so far, by mimicking examples from four different books, produces a messy scramble of lines when I try to plot the loess curve.  How can I deal with this situation?

Why not remove rows with NA. If you think otherwise, then tell us where you think we should plot the tuples c(NA, Y_i).

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David Winsemius
Alameda, CA, USA