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color by group in ggplot
5 messages · Ye Lin, David Winsemius, arun
On May 3, 2013, at 1:37 PM, Ye Lin wrote:
Hey, I have a dataset like this: ID Var1 Var2 Group A1 1 1 BB A2 1 2 AA B1 2 1 CC B2 1 3 DD C1 1 2 EE I would like to plot the points of Var1 and Var2, use "ID" as X-axis, but color the points by "Group". I can only manage to color the points by "ID" after transform the dataset to "tall" using "reshape" package.
If I were given the task of designing a plotting system that would "decide" what to do with a categorical "x-axis" request, it would probably deliver a barplot. My guess is that you do not want that. But what do you mean by a "point" whose x-value is "A1"?
David Winsemius Alameda, CA, USA
I want to plot the values of "Var1" and "Var2" on the same plot, with x-axis labeling as the list of IDs. But I want to color the points by their category in "Group". Is it possible to do in ggplot, or do i have to plot from scratch using basic plot?
On Fri, May 3, 2013 at 1:49 PM, David Winsemius <dwinsemius at comcast.net>wrote:
On May 3, 2013, at 1:37 PM, Ye Lin wrote:
Hey, I have a dataset like this: ID Var1 Var2 Group A1 1 1 BB A2 1 2 AA B1 2 1 CC B2 1 3 DD C1 1 2 EE I would like to plot the points of Var1 and Var2, use "ID" as X-axis, but color the points by "Group". I can only manage to color the points by
"ID"
after transform the dataset to "tall" using "reshape" package.
If I were given the task of designing a plotting system that would "decide" what to do with a categorical "x-axis" request, it would probably deliver a barplot. My guess is that you do not want that. But what do you mean by a "point" whose x-value is "A1"? -- David Winsemius Alameda, CA, USA
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HI,
May be this helps:
dat1<- read.table(text="
ID??? Var1????? Var2??? Group
A1??????? 1??????????? 1??????????? BB
A2??????? 1????????? 2??????????? AA
B1????????? 2????????? 1??????????? CC
B2??????? 1??????????? 3??????????? DD
C1????????? 1??????????? 2??????????? EE
",sep="",header=TRUE)
library(reshape2)
dat2<-melt(dat1,id.var=c("ID","Group"))
library(ggplot2)
ggplot(dat2,aes(x=ID,y=value,group=Group,colour=Group))+geom_point()
A.K.
----- Original Message -----
From: Ye Lin <yelin at lbl.gov>
To: R help <r-help at r-project.org>
Cc:
Sent: Friday, May 3, 2013 4:37 PM
Subject: [R] color by group in ggplot
Hey,
I have a dataset like this:
ID? ? Var1? ? ? Var2? ? Group
A1? ? ? ? 1? ? ? ? ? ? 1? ? ? ? ? ? BB
A2? ? ? ? 1? ? ? ? ? 2? ? ? ? ? ? AA
B1? ? ? ? ? 2? ? ? ? ? 1? ? ? ? ? ? CC
B2? ? ? ? 1? ? ? ? ? ? 3? ? ? ? ? ? DD
C1? ? ? ? ? 1? ? ? ? ? ? 2? ? ? ? ? ? EE
I would like to plot the points of Var1 and Var2, use "ID" as X-axis, but
color the points by "Group". I can only manage to color the points by "ID"
after transform the dataset to "tall" using "reshape" package.
Thanks for your help!
??? [[alternative HTML version deleted]]
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