Tom Wilding
2013-May-27 10:39 UTC
[R] Indexing within by statement - different coloured lines in abline wanted..
Dear R-list
I'm trying to get each regression line, plotted using abline, to be of a
different colour as the following code illustrates. I'm hoping there is a
simple indexing solution. Many thanks.
## code from here
colours=c("black","red","blue","green","pink")
Mean=500;Sd=10;NosSites=5;Xaxis=seq(1,5,1)
SlopeCoefficient=5;Site=(gl(NosSites,length(Xaxis),labels=1:NosSites))
Predictor=rep(Xaxis,NosSites)
InterceptAdjustment=rnorm(n=NosSites,mean=Xaxis,sd=50)
RandomIntercept=rep(InterceptAdjustment,each=length(Xaxis))
PreResponse=rnorm(n=length(Predictor),
mean=Mean+SlopeCoefficient*1:length(Xaxis),sd=Sd)
Response1=PreResponse+RandomIntercept
#create data frame
Data2=data.frame(Site,Predictor,Mean,SlopeCoefficient,RandomIntercept,Response1)
Data1=data.frame("Site"=Data2$Site,"Predictor"=Data2$Predictor,"Response1"=Data2$Response1)
#plotting
var=as.numeric(levels(Data1$Site))
par(mfrow=c(1,3))
plot(Response1~Predictor,data=Data1,xlim=c(min(Xaxis),max(Xaxis)),ylim=c(MN,MX),
pch=as.numeric(Site),main="Raw data with linear regresssions by
Site")
by(Data1,Data1$Site,function(Site){
par(new=T)
abline(lm(Response1~Predictor,data=Site),col=colours[])#index in here.
})
The Scottish Association for Marine Science (SAMS) is registered in Scotland as
a Company Limited by Guarantee (SC009292) and is a registered charity (9206).
SAMS has an actively trading wholly owned subsidiary company: SAMS Research
Services Ltd a Limited Company (SC224404). All Companies in the group are
registered in Scotland and share a registered office at Scottish Marine
Institute, Oban Argyll PA37 1QA. The content of this message may contain
personal views which are not the views of SAMS unless specifically stated.
Please note that all email traffic is monitored for purposes of security and
spam filtering. As such individual emails may be examined in more detail.
[[alternative HTML version deleted]]
John Kane
2013-May-27 13:08 UTC
[R] Indexing within by statement - different coloured lines in abline wanted..
Slightly diffferent approach but will this do what you want.
library(ggplot2)
ggplot(Data1, aes(Predictor, Response1, colour = Site)) +
geom_smooth(method= "lm", se = FALSE) +
ggtitle("Raw data with linear regresssions by Site")
John Kane
Kingston ON Canada
> -----Original Message-----
> From: tom.wilding at sams.ac.uk
> Sent: Mon, 27 May 2013 10:39:58 +0000
> To: r-help at r-project.org
> Subject: [R] Indexing within by statement - different coloured lines in
> abline wanted..
>
> Dear R-list
>
> I'm trying to get each regression line, plotted using abline, to be of
a
> different colour as the following code illustrates. I'm hoping there
is
> a simple indexing solution. Many thanks.
>
> ## code from here
>
colours=c("black","red","blue","green","pink")
> Mean=500;Sd=10;NosSites=5;Xaxis=seq(1,5,1)
> SlopeCoefficient=5;Site=(gl(NosSites,length(Xaxis),labels=1:NosSites))
> Predictor=rep(Xaxis,NosSites)
> InterceptAdjustment=rnorm(n=NosSites,mean=Xaxis,sd=50)
> RandomIntercept=rep(InterceptAdjustment,each=length(Xaxis))
> PreResponse=rnorm(n=length(Predictor),
> mean=Mean+SlopeCoefficient*1:length(Xaxis),sd=Sd)
> Response1=PreResponse+RandomIntercept
>
> #create data frame
>
Data2=data.frame(Site,Predictor,Mean,SlopeCoefficient,RandomIntercept,Response1)
>
Data1=data.frame("Site"=Data2$Site,"Predictor"=Data2$Predictor,"Response1"=Data2$Response1)
> #plotting
> var=as.numeric(levels(Data1$Site))
> par(mfrow=c(1,3))
>
plot(Response1~Predictor,data=Data1,xlim=c(min(Xaxis),max(Xaxis)),ylim=c(MN,MX),
> pch=as.numeric(Site),main="Raw data with linear regresssions by
> Site")
> by(Data1,Data1$Site,function(Site){
> par(new=T)
> abline(lm(Response1~Predictor,data=Site),col=colours[])#index in here.
> })
> The Scottish Association for Marine Science (SAMS) is registered in
> Scotland as a Company Limited by Guarantee (SC009292) and is a registered
> charity (9206). SAMS has an actively trading wholly owned subsidiary
> company: SAMS Research Services Ltd a Limited Company (SC224404). All
> Companies in the group are registered in Scotland and share a registered
> office at Scottish Marine Institute, Oban Argyll PA37 1QA. The content of
> this message may contain personal views which are not the views of SAMS
> unless specifically stated. Please note that all email traffic is
> monitored for purposes of security and spam filtering. As such individual
> emails may be examined in more detail.
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
____________________________________________________________
Share photos & screenshots in seconds...
TRY FREE IM TOOLPACK at http://www.imtoolpack.com/default.aspx?rc=if1
Works in all emails, instant messengers, blogs, forums and social networks.
Blaser Nello
2013-May-27 13:18 UTC
[R] Indexing within by statement - different coloured lines in abline wanted..
abline(lm(Response1~Predictor,data=Site),col=colours[as.numeric(Site[1,1
])])
-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of Tom Wilding
Sent: Montag, 27. Mai 2013 12:40
To: r-help at r-project.org
Subject: [R] Indexing within by statement - different coloured lines in
abline wanted..
Dear R-list
I'm trying to get each regression line, plotted using abline, to be of a
different colour as the following code illustrates. I'm hoping there is
a simple indexing solution. Many thanks.
## code from here
colours=c("black","red","blue","green","pink")
Mean=500;Sd=10;NosSites=5;Xaxis=seq(1,5,1)
SlopeCoefficient=5;Site=(gl(NosSites,length(Xaxis),labels=1:NosSites))
Predictor=rep(Xaxis,NosSites)
InterceptAdjustment=rnorm(n=NosSites,mean=Xaxis,sd=50)
RandomIntercept=rep(InterceptAdjustment,each=length(Xaxis))
PreResponse=rnorm(n=length(Predictor),
mean=Mean+SlopeCoefficient*1:length(Xaxis),sd=Sd)
Response1=PreResponse+RandomIntercept
#create data frame
Data2=data.frame(Site,Predictor,Mean,SlopeCoefficient,RandomIntercept,Re
sponse1)
Data1=data.frame("Site"=Data2$Site,"Predictor"=Data2$Predictor,"Response
1"=Data2$Response1)
#plotting
var=as.numeric(levels(Data1$Site))
par(mfrow=c(1,3))
plot(Response1~Predictor,data=Data1,xlim=c(min(Xaxis),max(Xaxis)),ylim=c
(MN,MX),
pch=as.numeric(Site),main="Raw data with linear regresssions by
Site") by(Data1,Data1$Site,function(Site){
par(new=T)
abline(lm(Response1~Predictor,data=Site),col=colours[])#index in here.
})
The Scottish Association for Marine Science (SAMS) is registered in
Scotland as a Company Limited by Guarantee (SC009292) and is a
registered charity (9206). SAMS has an actively trading wholly owned
subsidiary company: SAMS Research Services Ltd a Limited Company
(SC224404). All Companies in the group are registered in Scotland and
share a registered office at Scottish Marine Institute, Oban Argyll PA37
1QA. The content of this message may contain personal views which are
not the views of SAMS unless specifically stated. Please note that all
email traffic is monitored for purposes of security and spam filtering.
As such individual emails may be examined in more detail.
[[alternative HTML version deleted]]
______________________________________________
R-help at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.