Hi,
I want to thank Jeff, Dennis, c06n, and Hadley for their replies and
explanations. As you probably guessed, I am fairly new to ggplot am
trying to loose my lattice reflex while transitioning to ggplot.
Thank for the link to the ggplot external documentation.
Sebastien
On 10/23/2015 7:15 AM, Hadley Wickham wrote:
You have two problems:
* geom_line() always draws from right-to-left
* you're defining colour outside of the plot in a very non-ggplot2 way.
Here's how I'd do it:
library(ggplot2)
data <- data.frame(
x = rep(1:4, each = 25),
y = rep(1:25, times = 4),
g = rep(1:4, each = 25)
)
data$x <- data$x + 0.005 * data$y ^ 2 - 0.1 * data$y + 1
ggplot(data, aes(x, y, colour = factor(g))) +
geom_point() +
geom_path()
Alsonotethatcodeismucheasiertoreadifyouusespaces;)
Hadley
On Thu, Oct 22, 2015 at 8:46 PM, sbihorel
<sebastien.biho...@cognigencorp.com> wrote:
Hi,
Given a certain data.frame, the lattice xyplot function will plot the data
as.is and join the data point in the order of the data frame. It is my
(probably flawed) understanding that, using the same data frame, ggplot
orders the data by increasing order of the x-axis variable. Can one control
this behavior?
Thanks
Sebastien
Code example
library(lattice)
library(ggplot2)
data <- data.frame(x=rep(1:4,each=25),
y=rep(1:25,times=4),
g=rep(1:4,each=25))
data$x <- data$x + 0.005*(data$y)^2-0.1*data$y+1
col <- 3:7
xyplot(y~x,data=data,groups=g,type='l',col=col)
ggplot(data, aes(x,y,group=g)) + geom_point(colour=col[data$g]) +
geom_line(colour=col[data$g])
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--
Sebastien Bihorel
Cognigen Corporation
(t) +1 716 633 3463 ext 323
Cognigen Corporation, a wholly owned subsidiary of Simulations Plus, Inc.
______________________________________________
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