[R] Multiple Plotting help (lines don't always connect)

[Carl Witthoft]

Just my view on the lines/interpolate/don't interpolate controversy here:

I was taught once upon a time to plot actual data as points (with or 
without error bars), and plot fitted curves as lines.
Only when the density of data points is so high as to make a 'mess' of 
the chart is it ok to plot a line representing the actual data.

YMMV


Carl