We assume the Fo and Co represent the same data except in different
units (this seems to be approximately the case) so there is really
only one variable being measured here. If that's not the case let
me know. Below we read the data, define enough padding around plot
to do what we want, call xyplot, draw the right axis and add the right
y lablel.
library(lattice)
library(grid) # needed for grid.text
# data
Lines.raw - Date Fo Co
6/27/2007 57.1 13.9
6/28/2007 57.7 14.3
6/29/2007 57.8 14.3
6/30/2007 57 13.9
7/1/2007 57.1 13.9
7/2/2007 57.2 14.0
7/3/2007 57.3 14.1
7/4/2007 57.6 14.2
7/5/2007 58 14.4
7/6/2007 58.1 14.5
7/7/2007 58.2 14.6
7/8/2007 58.4 14.7
7/9/200758.7 14.8
# in reality next stmt would be DF - read.table(myfile.dat, header = TRUE)
DF - read.table(textConnection(Lines.raw), header = TRUE)
DF$Date - as.Date(DF$Date, %m/%d/%Y)
par.settings - list(
layout.widths = list(left.padding = 10, right.padding = 10),
layout.heights = list(bottom.padding = 10, top.padding = 10)
)
xyplot(Co ~ Date, DF, default.scales = list(y = list(relation = free)),
ylab = C, par.settings = par.settings)
trellis.focus(panel, 1, 1, clip.off = TRUE)
pr - pretty(DF$Fo)
at - 5/9 * (pr - 32)
panel.axis(right, at = at, lab = pr, outside = TRUE)
grid.text(F, x = 1.1, rot = 90) # right y axis label
trellis.unfocus()
On 7/10/07, Felipe Carrillo [EMAIL PROTECTED] wrote:
Date Fo Co6/27/2007 57.1 13.96/28/2007 57.7 14.3
6/29/2007 57.8 14.36/30/2007 57 13.97/1/2007 57.1 13.9
7/2/2007 57.2 14.07/3/2007 57.3 14.17/4/2007 57.6 14.2
7/5/2007 58 14.47/6/2007 58.1 14.57/7/2007 58.2 14.6
7/8/2007 58.4 14.77/9/200758.7
14.8
Hello all:
I am a newbie to R, and I was wondering how can I plot the Temperature
values above using Lattice or ggplot2 code. I want Date(X axis), Degrees F(Y
axis) and Degrees C( on a secondary Y axis).
Thanks
-
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and provide commented, minimal, self-contained, reproducible code.
