Re: [R] Lattice: Understanding How Points Connected by Lines

2012-01-01 Thread David Winsemius
On Jan 1, 2012, at 5:50 PM, Rich Shepard wrote: A data frame has one factor, one date, and one numeric column. When I plot these using the default pch of the open circle (first attachment), xyplot(TDS ~ sampdate | she.s, data = sheep.cast, main = 'TDS in Sheep Creek', ylab = 'Concentration

Re: [R] Lattice: Understanding How Points Connected by Lines

2012-01-01 Thread Rich Shepard
On Sun, 1 Jan 2012, Rich Shepard wrote: Where do I start to look for the reason for this behavior? Perhaps the dates are not in sequence? So I need to use zoo to order the dates sequentially? Rich __ R-help@r-project.org mailing list https://sta

[R] Lattice: Understanding How Points Connected by Lines

2012-01-01 Thread Rich Shepard
A data frame has one factor, one date, and one numeric column. When I plot these using the default pch of the open circle (first attachment), xyplot(TDS ~ sampdate | she.s, data = sheep.cast, main = 'TDS in Sheep Creek', ylab = 'Concentration (mg/L)', xlab = 'Time') I see the higher concentrat